The only public social media I use is Twitter, and that’s mostly to follow other people.
I guess if you do actually want to contact me, drop a comment here, briefly describe why you’re looking to get in touch with me, and I’ll get back to you by e-mail. I’ll leave your comment hidden; it’s just a way for people to submit their e-mail to me without myself having to deal with automated spam.
Or otherwise just message me on Twitter.