I keep tabs open for later if they are not immediately needed for work, or I move them to my reading/watching list in Trello. No social media really. My biggest distraction is HN; a long running test or a few minutes until my next meeting will usually have me skimming here. Worse is when I can't sleep, like right now. Instead of sitting with my eyes closed since 2am, I'm casually reading comments that don't actually enrich my life.