Many years ago, I worked for a skin-care expert.
She validated what Lin has said. In fact, she said that a simple soft washcloth was as coarse as anyone should be using on their skin daily, because sloughing the skin too much can cuase premature wrinkling and damage as you NEED the top layer of your skin for protection.
Once a week or less, using a different exfoliant on your body like a salt rub, or an oat or rice bran scrub is fine, but do be gentle with your skin.
Overwashing as well can cause your skin to compensate for oil loss by producting MORE oil, not less.
So, just practice sensible skin care: wash your skin once or twice daily with a gentle cleanser and a washcloth, try and keep things that can irritate it (like harsh detergent residues in your clothes, etc.) away from it, and if you have a serious problem with acne, see a dermatologist.
(Also, be aware of what you put INTO your body. Drinking plenty of water and eathing healthfully can make a big difference. And if you aren't getting enough daily vitamins and minerals that support cellular function, like vitamins E, A and D, and the mineral zinc, consider supplementing.)
Editor and Founder, Scarleteen
"If you're a bird, be an early early bird --
But if you're a worm, sleep late." - Shel Silverstein