For yourself, I suggest the bathtub! Something you can do as the water is filling... If you're flexible, you can scootch yourself up under the water coming out of the faucet, this is a free, hands-off vibrator! Plus you can always adjust the water temp to make it cool or warm. Apparently coolness gets some women off. About the only time I notice that is if my bf's fingers are wet, and some of it has evaporated when he puts his fingers inside of me.
Also in the bathtub: lie on your back, and use your fingers, or even a washcloth to stimulate yourself. The bathtub is a great place to try out things on yourself, like possibly anal. I know it's a wierd though to stick your own fingers in your anus, but... If you were to have anal, he'd be sticking his penis in there, and it's not even his own anus! So! Yeah.