First of all, you can email me. I have several accounts, but the definite way is to use the GMail one.

Then, there's always a phone call. You have to options here: mobile phone and the landline.

There's a whole set of IMs that I use, including Jabber (mishok13@jabber.ru), IRC (mishok13@FreeNode) and Skype (andriy.mishkovskyy). And, well, you might also drop a few lines at any of these services