wash your face at least once a day with a cleanser made specifically for your face, use a moisturizer, change your pillowcases daily, drink more water
there's this one African Black Soap that has chunks of salt sticking out of it
for the love of god don't use anything like this, the salt will create cuts in the skin, allowing bacteria to go deeper and irritating the existing acne
and if you've tried all of these then either go to a dermatologist, or there are a few online dermatology sites that send you prescription creams for really cheap depending on the state you live in. I've been using an online derm for ~3 months and have no complaints so far.