This one always gets me off really well. It all has to do with the mind, so I think dirty thoughts. What you do is after getting really wet from your thoughts and massaging your clit, slide a finger in your vagina. Some women are opposed to this, and find that it hurts, but at the same time, put a finger in your anus (make sure its well lubricated!). It feels AMAZING and after rocking and grinding, or just pushing in and out, you will have an explosive orgasm!