Eating the right stuff is at least a little important. Protein and unrefined carbohydrates are more effective at making us feel full than fat and refined carbohydrates.
Put simply, a 300 calorie cookie is less filling than a 300 calorie lean steak, so you're more likely to want to eat more after the cookie than after the steak.
Yeah, I'd agree if we're just talking about weight loss. However, it's important to make sure that you get all the vitamins and micronutrients you need in your diet as well to be healthy. Fortunately, it's not easy to become deficient in most of these micronutrients.
Put simply, a 300 calorie cookie is less filling than a 300 calorie lean steak, so you're more likely to want to eat more after the cookie than after the steak.
http://www.eufic.org/article/en/artid/what-makes-us-feel-ful... http://www.ncbi.nlm.nih.gov/pubmed/16002791