I am confused about what one is actually eating when on a diet and how this differs from eating when not on a diet. So many articles I read talk about sticking to healthy choices and how food brought into offices, such as bagel Fridays, or pizza lunches makes it difficult for people to stick to their diets. I consider myself to be on a lifestyle diet, exercise frequently, eat tons of fruits and vegetables but also frequently have bagels and pizza. What do you change when you go on a diet? What are you eating to maintain it?