I agree with you that watching your portions is a big part of healthy weight loss. Also make sure you don't totally deprive yourself of anything, that will just lead to binging later. No food is totally off limits, you just need to learn how to properly portion it. Don't concentrate on your end goal, it will just make you dissapointed. Work on small goals at a time. I did weight watchers and did wonderful on the program. I'm not sure how old you are, but I think if you are under 18 you need a doctors note.

Another important thing is don't starve yourself! Not eating enough can actually make weight loss slower instead of faster. Your metabolism will slow down because your body will try to conserve the calories you eat. You need to eat to lose weight! Eat breakfast, it will get your metabolism started.