Every day, read the email. Answer, as best you can, yesterday's email. The yesterbox technique helps out, though it's not perfect.
Follow interesting people on Twitter, but not too many interesting people. Manage the tricky relationship of "friending" people on Facebook, knowing full well once you have befriended someone it's a huge social transgression to unfriend them, even if you don't care for their particular brand of cat videos or politics. Post something clever enough frequently enough.
Attend to the matter of staying in touch with people who are a long ways away, hoping that they will come to town during travel season. I have been using Contactually to help me sort through making sure that people don't completely drop off the map. Every day I could reanimate a half dozen old relationships; I'm lucky to do that once a week.
Somewhere all in here, post to this blog. I think I've reached the era of peak blogging. This site has steady state traffic that's not overwhelming, and if I want to get comments on something it's easier to post to Facebook. I keep posting out of a sense of diligence, because I've been doing it for a long time, and because there are some things that you need to be diligent about even if there is no obvious reason why.