As more and more people are hosting their own webpage or pages, advertisers have learned how to make contact with the audiences who visit the pages. And not just randomly either; there are now advertising programs that target ads specifically to the site that the person is viewing. They are called contextual advertising programs because they search through the context and content of a page and identify keywords. They return ads to that page that the program believes would be relevant and interesting to the viewer. For example, if you are visiting a website on low fat recipes, you might find ads about low fat products or weight loss products.

Website owners aren’t the only ones using this form of advertising to generate revenue. You’ll see these ads on search engine pages themselves. For example, on Google, the ads appear in a column on the right hand side of the results page. The keywords you enter in the search box are used to target ads to you. Advertisers are hoping that the short ad they supply will lure you to their site, where hopefully you’ll either order their product or use their service.

Website owners can now earn money by allowing contextual advertisers to place ads on their webpages. The more people visit and click the ads, the more money the advertisers will pay to the website owner. Many website owners make a considerable stream of income from these programs. But the ads have to be well targeted in order to get people to click. Which is why right now there is so much excitement about a new contextual advertising program being tested and prepared for the market. Everyone out there making money on contextual advertising is waiting to see if the Yahoo Publisher Network (YPN) product will return better results than the leading Google Adsense product.

At the moment, YPN is still in beta testing. A group of users were invited to trial the product and the reviews on blogs and postings all over the web are somewhat consistent on one aspect. As of now, it seems that YPN is not returning ads that are as relevant as the ones that Adsense users are finding. For example, one blogger reported that on a website on PHP programming, YPN returned ads for a florist and for a phone service provider. The blogger couldn’t understand what words the YPN program picked up for the florist. But it was the word ‘hello’ that apparently signaled the ads regarding the phone service.

Additionally, some users have complained that YPN doesn’t seem to update earnings and visitor information as often as Adsense. So website owners have to wait to learn if changes they have made have actually impacted the visitors that they get. However, although neither program will release payment schemes until you register as a user, it seems that YPN is paying more per click than Adsense. But the feeling is that payments will be made more appealing long enough to get website owners to switch from Adsense to YPN, but then prices will even out. Some argue that in the long run it won’t matter if YPN pays more if they can’t improve their ad relevancy because they won’t get the number of clicks from visitors to see a real difference in their earnings.

As YPN is being tested, they are getting opinions and feedback from the participants. So in time, the service may be improved. However, competition for Adsense is a healthy thing. It will force both companies to continually strive to improve their service and offerings so that webmasters can continue to benefit from a healthy stream of income in the future.

For a complete how to guide and practical advice on boosting your CTR and Google Adsense revenue, visit http://www.AdsenseHowTos.com.

The GI diet, based on the Glycemic Index, has recently become very popular, but the GI ranking system has been around since 1981. There have been several books published on the success of the GI diet, but is it really a diet or a lifestyle change?

The glycemic index

Dr. David Jenkins, from the University of Toronto in Canada, developed the glycemic index to measure the speed at which foods break down in the body to produce glucose. While originally intended to help diabetic patients control their glucose levels, it was soon used to help individuals trying to lose weight to control their eating habits and hunger. The key was to decrease the fast breakdown of foods into glucose. Glucose is the natural source of energy for the body. It produces a rush of energy when the food is broken down, and then when it is burned up, it leaves a feeling of hunger and fatigue.

Depending on how fast they elevate the blood sugar level after eating, foods are considered high, medium and low GI foods. Low GI foods rank less than 55 on the glycemic index scale, medium GI foods go from 55 to 70 and high GI foods rank higher than 70. High GI foods break down very quickly in the body and make you feel hungry again soon after consuming them. Low GI foods are slowly digested and absorbed so you feel fuller for a longer period of time after you eat.

High GI foods include:

• white flour products like white bread, croissants, doughnuts;
• heavily processed foods like corn chips, potato chips or pretzels;
• foods high in sugar like cookies, rice krispies, ice cream;
• high starch vegetables such as potatoes and parsnips;
• fruits high in sugar - watermelons, dates and other dried fruits.

Medium GI foods include:

• most types of pasta;
• rice;
• some fruits like mangos, apricots and raisins;
• some vegetables like baked beans.

Low GI foods include:

• most fruits and vegetables;
• legumes;
• cereals that are high in fibers but low on sugar;
• dairy products like low fat plain yogurt, whole, low fat or skimmed milk;
• whole grain breads.

The Low GI Diet

The low GI diet focuses on changing eating habits so that the majority of the foods consumed are from the low GI food group. These foods take longer to break down into glucose in the body. This does two basic things:

• Produces a more even level of glucose throughout the day to avoid those high glucose times followed by the low glucose slumps.
• Stops cravings and hunger from occurring as much.

When these two components combine, they allow the dieter to eat a balanced meal and not experience the "energy slumps". The whole grains and unprocessed foods take more time for the body to convert to glucose and keep the feeling of being full for longer. It also prevents those cravings which tend to cause overeating or consuming foods that are not on the eating plan.

However, the diet should not rely exclusively on the glycemic index as low GI foods aren't necessarily healthy. Foods should be chosen based on their overall nutritional value. The glycemic index is influenced by a sum of factors like: the nutrient content of the foods, the extent to which they are processed, the cooking method, food combination or ripeness in the case of fruits and vegetables.

Products that are high in fat have a low GI as they don't break down as easily as the ones high in carbs. That doesn't mean you should choose to eat high fat foods in order to stick to the index. As an example, whole milk is ranked lower than the fat free or low fat one.

The glycemic index doesn't rank foods that do not contain carbohydrates, like fresh meat, chicken, fish, eggs and cheese. However, it includes processed foods that include meat and diary products. For a healthy low GI diet you should choose lean or low-fat meats that have been trimmed of visible fat, skinless poultry, fish and low-fat dairy products, even though they aren't ranked.

The nutrient content is also very important. Between dates or watermelon and a bag of crisps the obvious choice is the fruit even though the watermelon is considered high GI because of the sugar content and the crips are considered low GI as they are high in fat and slow down the absorbtion process.

It is also important to remember that the glycemic index ranks invidual foods only, not whole meals. Depending on how the foods are combined, the overall GI value of the meal can change and cannot be measured accurately, but the main idea is that including low GI foods in your meal will result in lower GI value overall.

The low GI diet does not lead to rapid weight loss; rather it results in a steady and constant decrease in body weight. The individuals who use this plan find that they have more energy and therefore are more likely to exercise.

So is the low GI plan a diet or a lifestyle? Most experts agree that it is a diet plan that leads to changes and becomes a lifestyle. Eating low GI foods just makes good sense for weight control and maintenance, energy levels and healthy eating.

Jane Flinders reviews some of the most popular diets and diet aids at http://www.DietsIndex.com where you can find different diet plans, sample menus, food lists, diets classifications, tips and tricks on how to stay on the diet you choose.

The Zone Diet is founded on the idea of eating a balanced ratio of carbohydrate, protein and fat. By eating in the ratio of 40/30/30, meaning 40 percent carbohydrate and 30 percent each of protein and fat, the idea is that your metabolism is impacted to run at its most efficient level. The diet also emphasizes getting the right amounts of fruit, vegetables and lean sources of protein. The right combination of foods results in an increased metabolism and weight loss. Designing meals that meet these requirements can be tricky, but the program offers a range of ideas. You can also purchase cookbooks with recipes intended for the followers of the diet as well. But some people still wonder what they are allowed to drink when following the diet.

You can still drink juice and either low fat or skim milk, as long as you count the calories and grams of protein, fat and carbohydrates. But since our bodies are made mostly of water, water is the recommended drink. The health benefits of drinking enough water cannot be underestimated. Water helps to flush toxins out of the body, it keeps the cells and metabolism supplies with the water needed to work properly and it quenches thirst better than any other fluid you can ingest. The Zone Diet guidelines require that followers drink at least sixty-four ounces (or eight cups) of fluid every day. If you are one of the many people who simply don't like the taste of water, there are other options for you.

You can add a squeeze of lemon, lime or orange to your water to give it a little bit of extra flavor. Or, you can purchase bottled waters that have a slightly fruity flavoring to them so that they taste more like a seltzer than plain water. Pour them in a glass full of ice for a refreshing beverage. It's important, however, to read the labels, even for water. Since the Zone Diet guidelines require you to limit sugar and carbohydrates, you don't want to take in sugar unknowingly. Carry a bottle of water with you wherever you go and refill it whenever it gets empty. Soon enough you can change your habit of drinking soda, tea or juice, especially when you see the good results in your weight loss efforts.

If you are a coffee or tea drinker, you will need to make some changes as well. The Zone Diet guidelines instruct you to eliminate caffeine from your diet. This change can be difficult and cause withdrawal symptoms like headaches. It might be a good idea to gradually start eliminating caffeine from your diet in the weeks before you begin following the Zone Diet guidelines. Decaffeinated coffee or tea will let you still enjoy the taste of coffee or tea without the caffeine. The same is true of sodas. Regular sodas should be completely eliminated. They simply have too much sugar. Diet sodas come in enough different flavors that you should be able to find one that you like. However, you do need to switch to decaffeinated versions in order to improve your chances of success on the program.

Alcohol is one other beverage that will have to be limited or eliminated. There have been some studies that have shown that moderate alcohol consumption can actually have some positive effects on your health, particularly your heart. If you are currently drinking alcohol as part of a program to protect your cardiovascular health, you shouldn't stop without discussing it with a health professional first. However, the Zone Diet doesn't require that you totally eliminate all alcohol from your routine, just that you limit it to occasional use. There's no reason that you can't continue to enjoy an alcoholic beverage from time to time. Just keep in mind that the more beverages that you replace with water, the more good you are doing for your body and the faster you are likely to see weight loss success.

Martin Beans shows you how the Zone Diet works at http://www.enterthezonediet.com - a complete guide on the Zone diet where you'll learn how to calculate your daily intake of protein, fat and carbs and you'll find allowed food lists, Zone diet menus and tips that will ensure your success with the program.