4. Don’t drink coffee
At least for three hours before bed, say. Do you say you’re immune to its effects? Good for you. Avoid it anyway.
Besides, it doesn’t take the body long to develop a tolerance for caffeine. It means that after a while it won’t help you fight fatigue, but the harmful ones will remain. If you like to drink it because it tastes great, but don’t rely too much on coffee to help you concentrate!