I think I'm addicted to tapping my phone's screen every now and then. I've found a workaround, though, and this helps: turn the phone away from you, so it's face down or facing away if it's on a stand. Then, if you feel like tapping it, tap, tap. The outcome? You won't wake up the screen, won't see it, won't get drawn into a tangent, work-related or personal.