I wouldn't even know where to begin. There are so many great websites detailing the life of the man that it seems petty to put a paragraph. So just go and get a really interesting History lesson:
http://www.eurohistory.com/Rasputin.html - Good solid information
http://184.108.40.206/phreno/rasp.html - Phrenology!?
http://homepage.eircom.net/~pbarry/ras2/ - Great site, includes pictures, his fascinating last letter to the Tsarina, and fun stuff.