Play with my nipples (lick them, suck them lightly, tickle them with your fingers ect..) or do any of the same to my clit. I'll be wet in a jiffy. There are other things, but those 2 (technically 3, two nipples and one lovely clit) always work fastest.
I'm also really big on ass play (receiving or giving).. but not everyone is down to play with booty-hole or let their booty be played with, so I don't know how much that would help your situation.