E-mail is generally the best way to reach me.
My e-mail address is my first name (Robert) at this site's domain.
There are a bunch of 'ThinkRob' accounts elsewhere. Some of them are me. Most of them are not. I don't, for example, speak Polish.
I dislike social networking sites, so I don't use them. I prefer real life anyways.
There is a user with the handle of "rtomsick" on Twitter.
He's not me. I do not, and will never, "tweet".
International: Use e-mail. It's cheaper.
See this domain's WHOIS admin contact.