Basically this : http://www.evga.com/articles/00675/.

Scroll down, sign up. Then after you sign up and log in, go back to same page. Add your SteamID and thats it.

All games and there servers are on the right side over here:
http://www.evga.com/gaming/

Theres 2 European tf2 servers, and several other games of course.

Just enter a server, type “+forward” in your console and idle tf2 for 2 hours. Easiest lottery entrance ever.