To me the phrase "going on a diet" implies a change in your eating habits that has a start and an end. To use my Missus for an example; she starts a diet and loses some weight, then she ends the diet and gains the weight back. Over and over.....
That weight loss roller coaster style didn't work well for me, so I just changed my eating habits permanently. I try to cut the fat out of my diet from meats as much as possible, I mostly eat chicken breast, turkey breast, and fish. They are good low fat sources for protein, and you can use them as a beef substitute in a lot of recipies.
Like Billcycle, I eat a lot of veggies and fruit. I don't measure food serving size much beyond saying a serving of carrots should be about the size of your fist to be considered a full vegetable serving, however go ahead and eat more if you want...I don't think you can eat too many vegetables.
Be a label reader. Just because a food product says it is low calory does not mean it is low fat. I've seen diet dinners sold in the grocery store that claim in big letters "Low Cal" - "Only 250 Calories", then you read the nutrition information on the back and 120 of those 250 calories come from fat. Sure it's a low cal entree.....but it's almost 50% fat! :eek:
Anyway, I say make healthy eating your normal routine. By doing that and getting regular excercise you'll lose excess weight.
And it doesn't mean you shouldn't eat pizza, or a cheeseburger, etc if you really have a craving for one. I just try to eat healthy 80 to 85% of the time and when I eat pizza or a cheeseburger, that's when I'm on a diet. 😉