Just stand up straight!! Seriously, this is one of the easiest ways to have a noticeable positive impact on your appearance, and how your clothes fit, and how you feel about yourself. Slouching is actually a pet-peeve of mine, and I want to tell everyone I see to just stand up tall and straight.
Now, most of us do not look like supermodels. And granted, even if a supermodel slouched, she likely wouldn’t have a poochy belly or saggy breasts anyway. But the point is, she wouldn’t look like a model, and her clothes wouldn’t look their best.