The only ones I use are Pinterest and Instagram. Pinterest is more for work, though I do save ideas for personal use too. I try to log in every day and pin stuff.

Instagram I check a couple times a day to see my subs, but some of that is work related too because I follow a lot of parenting/kids related stuff.

Facebook and Twitter I do (historically) for work... well haven't for a while.... but will be picking it up again soon.

How often do you frequent social media sites?