See if this is familiar: You post a picture on your social media account, maybe of your vacation or of the meal you prepared, or of your pet doing something so adorable that it puts videos of other people’s grandchildren to shame. Your few dependable “likers” are the first to acknowledge your post with the requisite “thumbs up” or heart. You put your mobile device away to work on that project that’s due at the end of the week, or to eat the meal you just prepared and showed off online. But then you start checking in with your social media account to see if any new reactions have come in. Maybe you pull out your phone during the dinner, or you get stuck on a section of the project and think, Well, I’ll just go back online to check my social media account, see what others are up to. In the meantime, maybe another “like” or reaction has come in, and then you see a fascinating article, or a video, or a friend’s post, and you find yourself responding, and all of a sudden, three hours of your life have gone by and you haven’t gotten anything done.