An advanced techniqe for those women who can handle direct stimulation of their clit is the clitoral blowjob. Begin by sucking slowly on the clitoris, as if you were giving it a tiny blowjob. Gradually increase the intensity of the sucking, then begin to add a little flick from your tongue now and then. As she gets closer to orgrasm, bring her over the edge by continusly swirling your tongue around the tip of the clit while you suck on the base of it. This one is guaranteed.