I don't wash my face every day. This might sound weird or gross to some of you, but my skin seems to break out more often when I wash it every morning and night (keep in mind that I don't wear makeup every day). Sometimes I just go over it with a wet washcloth, then put some moisturizer on if I need it. Do what works for you!

An extra tip for those with acne: that's been an ongoing battle for me (which I've pretty much won with birth control - if your acne is hormonal, it really does help). I realized that if I used too much benzoyl peroxide or salicylic acid, it did not do good things for my skin. I was tempted to overuse it in the name of prevention - don't!