The absolute easiest of all acne remedies is to drink more water.  I am not saying just a little bit more water, drink a lot of water.  Most of the other stuff that we drink like coffee, soda, beer, and tea all dehydrate the body by making us pee more often.  Water will help balance you out.  Increased water intake will flush a lot of the crap out of your body that will normally end up trapped inside of your pimples.  There is a huge difference between oily skin and hydrated skin.  Oily skin will break out frequently and hydrated skin will prevent pimples.  Increase your water to at least a half gallon per day.  Drink more if it is hot or if you are an athlete.