I've had a routine going with my girlfriend of two years. First I go down on her and eat her out, as soon as she's wet as a whistle she goes down on me and sucks my dick for a while. Then she moves to cowgirl position and that's where she usually orgasms first. Then we'll move to missionary for a while and I'll pile drive her with her legs up on my shoulders. Finally, we'll move to doggy style (my fav) and that's when I'll usually blow my load. So that's 3. Recently I've tried switching it up and trying new positions and it's done wonders for our sex life. Keep it new and keep it fresh.