Normally people affected by acne spots are those which have oily skin. In this case four to more time wash your face with any good soap or face washer. In teenage normally most of the people get acne spots, this happen due to genetic change in the body hormones at this age. In this case not rub this spots. These are routine mater and automatically disappear after some time.
EDIT BY John -
I don't think the answer above is a good answer. For those who suffer from moderate to severe acne, simply washing your face will not cure anything. A better answer is to look at the toxicity levels in your blood and try and figure out ways of lowering them. Whether that means balancing hormones, eating less sugar, or curing a yeast infection depends on each individual. If you have low toxicity in your body - you don't get acne. This way is a cure rather than a cover up. See this article: How to clear acne for a better definition than I can give you..