The best way to get me horny is to get me either drunk or stoned. I totally lose my inhibitions and just was to do it like bunnies. lol.
I also can get pretty horny after playing around (especially when it includes mild physical exertion to get the blood pumping and endorphins flowing) - Like tickling, wrestling (only when he's easy and lets me win), chasing each other, etc.
"Truth or Dare" is great too. It often involves intimate topics, and a lot of fun playing around. Anything that feels a little naughty like that kinda gets me going. Like sneaking off to the car while we're out at a party or club to go kiss or even just chat. I kinda like feeling a little mischievous - totally a turn on for me.
Once we're already naked, I like it when he is very slow and light in touching me - especially on my thighs and behind my knees. And kiss slowly and passionately. Touching around private areas without touching them right away is a bit of a tease and gets me going like crazy too.