Source: Portion Control: One Step Closer to Significant Weight LossAt its most basic, weight loss is a simple equation of calories in and calories out, which makes keeping track of what you're eating that much more important. "But what's the point," you ask, "when I'm already sticking to a healthy diet?" While we'd never tell you to stop eating avocados, nuts, or whole-wheat pasta, these foods (and others) are notoriously calorie-dense. ...