Perfect Your Posture-
"We're in the business of looking willowy, right? Lean? We're aiming to look more like a long, tall drink of water. You want to give the impression that you could reach the highest leaves on the tallest tree, and this applies just as well to 5-foot-nothings as it does 6-foot somethings. The difference is all in your posture.
Good posture has all manner of beneficial effects. It means your skeleton is aligned, with your bones in the right places and not under undue stress. So hold that head up high, pull in those abs, raise the rib cage, lengthen the neck, and away you go."
-Mimi Spencer, fashion journalist, 101 Things to Do Before You Diet.