Remember our "obvious-but-surprising" tip about using a clean pillowcase?
Same thought applies to other things that touch your face. Your phone being probably the #1 overlooked contender.
How many times each day do you use your phone? Well, a dirty phone leaves behind dirt (and oil, and germs) on your skin. So clean your phone, and you'll have a positive effect on your skin as well!
Use distilled water for the screen and camera; use rubbing alcohol for hard plastic – such as the body of the phone and possibly the case. Here's a simple how-to on cleaning your phone.
Take a moment and think about what else touches your face. Your glasses or sunglasses might be an obvious answer. So clean them occasionally. Work phone? Clean it.