Diet food! I'm so confused!!?

All this different diets are so contractdicting! One say you can drink a certain food and another one say its bad for you. For example, i've be picking on grapes as i tought they 'd be better than choccolate! Now my auntie who is on the slimming world one say they are "free" foods so you can munch through them and my friend who goes to solidity watchers says they enjoy points as they contain sugar so i shoulndt! Also i heard somewhere that unsalted nuts and seed are meant to be biddable to snack on (in moderation) if you are dieting as they contain good fat but someone else told me they are bad for you!! Just out of curiosity, what character of thing do you snack on when on when trying to loose consignment (apart form the obvious fruit)? Or what do you put away on a regular day? You hit it on the fastener when you said all food within moderation don't worry almost all those on these fashion diets as the don't work if you are health conscious look at the G I diet for well living it will inform you better than me!
Stick to 1 diet, ie slimming world or weight watchers as they are both different.