Maybe because of Food & Fitness class and in general being ever more conscious of what I eat, I have been changing what/how I eat. Not dieting or avoiding foods, but by 1) eating smaller meals and 2) eating more often. This and lots of dance/exercise means fast metabolism and healthier being.
I think portion control and exercise is a much less stressful way to go than dieting. And portion control doesn't have to involve much of saying no - part of it is switching things around and tricking your eyes.
An example here is how I eat lunch at my internship, where everything is plentiful and self-serve. I take a plate and fill it with salad, then I take a bowl and fill that with starch and meat. It's a reversal from how things usually go, where the plate is starch and meat, and the bowl would be salad. (Which reminds me of the video we watched in Food & Fitness - it talked about Americans planning entrees around meat with starch and vegetables as sides instead of the other way around.)
Also, once I'm full I don't eat any more. Which is hard because I was brought up to eat everything in front of me, to never waste food. So I try to gauge my hunger level and only get enough food that I can finish. (I no longer feel bad about throwing away junk food though. In my mind since it's devoid of nutrients, it's not waste.)
So if you're contemplating healthy changes in diet or lifestyle, I would recommend portion control, and exercise. You don't have to say no to yourself to look good and feel better!