Don't wear tight clothes. Things tight around the body (including belts) can cause irritation and don’t allow skin to breathe. Keep clothing clean including scarves and hats.
Remove makeup. This is an always. Over the day makeup collects oils and bacteria. The skin repairs itself at night.
Throw away makeup older than 6-months from date of purchase. Sorry, it's a perishable product that does degrade over time.
Keep hair clean. Minimize getting hair products on the skin which can cause irritation and inflammation.
Protect by using a good sunscreen. Zinc oxide, the physical block ingredient in quality sunscreens, is used as part of acne treatments. It' healing & non-inflammatory
Protect from the sun. Over exposure to sun can cause the body to produce extra sebum, which may worsen acne and inflammation.
Read article about lack of sunscreen here.