Okay, i know this will sound crazy but it has worked for me. Run for at least 10-15 minutes a day without make up. This causes your pores to sweat out the toxins. Make sure to take a shower after or the sweat and dirt will sit on your skin and make the acne worse. This is so easy and helps you get in shape at the same time. DO NOT wear make up. The makeup will not let as much sweat and toxins out, causing buildup. This is what i do to prevent acne. I do not use any fancy regimins. I just run.