Personally speaking, I have a lot of luck with Neutrogena Acne Stress Control. One comes in a Power-Gel Cleanser and another one in the Liquid Toner. I advise using both. For occasional breakouts, I aslo use Oxy Spot Treatment.
Keep in mind, no pimple is going to go away overnight, but they can and do improve overnight. What ever you do, do not pick it!!!! Good luck.