Finding the proper diet and weight loss program for you requires a lot of research, understanding your body type and ideally consulting a physician.
With the large amount of programs available today, you want to make sure you are not embarking on testing a fad but rather a tried and true, proven diet system for yourself. There are also many different methods and types of diets in terms of what they do for you physically.
One of the best places to find a great description of many diet plans is dietdiet.com. This website keeps up to date with the latest program systems and their results. You also get to see food pyramids that accompany each diet as well as before and after photos, which always helps motivate those trying to lose weight.
Recently the Dash Diet won top diet of the year by a US News survey so we recommend you go read about this diet as a starting point. From there you can either check out each diet on it's own or you can go to the “People” section and read about which of the celebrities have been on. Often times it's easy to see the results of a celebrity's workout through their before and after photos since we so routinely see celebrities on TV.
Some of the main categories of diet programs to choose from are ones that cut back your daily caloric intake, diets that incorporate workouts to burn calories, diets that revolve around the types of food you eat (carbs vs proteins vs fruits vs vegetables), diets that eliminate sugar, etc. The options for the type of program you pursue are abundant so you must first figure out why you think you are experiencing weight gain. This is a great first step in figuring out which diet type will help you lose the most amount of weight in the most efficient manner, while still feeling good and healthy.
If you are uncertain of which program is right for you, it is recommended that you ask your physician for a recommendation. If you don't have a regular doctor you visit then be sure to get a recommendation from a friend or coworker; or read reviews about the doctor online before making a selection. It is important to choose a doctor who treats his patients well.
As a starting point, you can always go to the DietDiet.com website to familiarize yourself with many of the diet types.