Since I myself have problems keeping track of all the social media platforms I employ regularly (or at least semi-regularly in some cases), here's a compilation:

Twitter: @matthewbmowery

Email: matt.mowery@oakpress.com

Facebook: www.facebook.com/matthewbmowery
Linkedin: Matt Mowery
Google+: Matthew Mowery
Sulia: http://sulia.com/matthewbmowery/
Flikr: http://www.flickr.com/photos/matthewbmowery/
Tout: http://www.tout.com/u/matthewbmowery
Klout: http://klout.com/#/matthewbmowery
Foursquare: https://foursquare.com/user/1444204
Instagram: http://instagram.com/mmowery2323
tumblr: http://matthewbmowery.tumblr.com/
Pinterest: http://pinterest.com/mmowery2323/
Blogger: http://opoutofleftfield.blogspot.com/

I'm sure I'll think of more ... but this is a partial list.