1) Using words that aren't sexy. My favorite examples: moist, juicy, plowed, etc. Or referring to any kind of orgasm as ripping, pulling, or slipping through flesh. I was guilty of this in a lot of my beginning stories and now it's on the Watch-Out Edits list.
2) Keeping an intense focus on the action throughout the scene using all five senses. One of my favorite things to do is to use taste in a scene as much as I can. Don't recall where I read that writer's barely utilize this sense, but the notion stuck with me. It's a fun one to toy with.