Avoid touching your face face with your fingers or leaning your face on objects that collect sebum and skin residue like your phone. Touching your face can spread the bacteria that cause pores to become inflamed and irritated. To keep bacteria at bay, wash your hands before applying anything to your face, such as treatment creams or makeup.
Remove your makeup before you go to sleep. When buying makeup, make sure you choose brands that say "noncomedogenic" or "nonacnegenic" on the label. Throw away old makeup that smells or looks different from when you first bought it.
Keep hair clean and out of your face to prevent additional dirt and oil from clogging your pores.
Protect your skin from the sun. It may seem like a tan masks acne, but it's only temporary. A tan may worsen your acne, not improve it. Tanning also causes damage to skin that will eventually lead to wrinkles and increase your risk of skin cancer.