A good way in which to find the best diet for you is to think about what you hope to gain from your diet. Are you looking for a way in which to lose weight or are you looking to lose weight and tone up, or are you simply looking to begin a healthier regime? Next, think about your current day to day routine and where it will be possible to easily stick by your selected diet. Once you know these things, research into the different diets and the ones which you feel you could easily stick to. That way, you will have a diet which is best for you.
Hope this helps :)
Nice answer freckles! I think that a lot of peole don't really think about all of those things when wanting to go on a diet.