Just sharing my approach. Phone is for calls and short messages, banking apps. After 6pm I reply only for close friends/family. No gaming. No movies. No tv. Old Ipad Air for casual browsing/rss. Work computer is only for work. Different machine is research and learning. Book reading on e-reader and paper. Drinking lot of water, active breaks every 30 minutes. When I feel that I have reached my cognitive daily peak - I stop everything and focus on relaxation. Never been so happy and productive in my life:)