Just something to calm myself down and relax. I've heard it said that you should be around other people when you want to self-injure, so that it becomes impossible. I've found inconspicuous ways of doing it anyway, though, and that makes me feel really uncomfortable. You could try the above if you wanted to, or you could call someone if that would be easier, or maybe just go to someone that you're close to and tell them you want a hug. During that kind of thing I won't let myself hurt myself, out of respect for their feelings.
Animals are great.
Pet the cat, brush the dog, whatever. I have one cat to whom I am especially close, and she trusts me more as I trust her more. It's really cool. Plus, you can talk to them and they won't think any less of you, and you can be completely honest. They won't tell anyone.