Figure Eight Is Great!
I have found that while masturbating, using my fingers often takes too long, so I use a vibrator. One day I was having trouble climaxing and I tried manuvering my vib in a figure eight motion over my clit (of course alot of lube really adds to it) and I almost couldn't handle the orgasm...it helps to do it really soft the first couple times till you get use to the way you want to rotate it. Have fun!