Never with anything sharp.
With blunt objects I've hit myself with in attempt to drown out emotional pain with physical pain. Also attempted suffocation, induced hyperthermia, alcohol overdose and was very into heavy drinking and smoking for a while.
Male, 18, straight.
Now all's good though. Emotional pain's gone, and I've come out of it stronger than I went in. Slightly improved the health of my lifestyle afterwards as well. My girlfriend's worried my depression might re-occur, but at this point I find that unlikely. Even if it does, it won't be the same way or for the same reasons. She also worries about if it had of gone to far and I'd have seriously harmed myself, but I guess that'll depend on the person. My intent was rarely to actually harm myself or kill myself, more to distract from my emotional issues so that I wasn't drowned in them, and I could start to deal with them.
Probably shouldn't tell her that I still don't really care about death, as that'll just make her worried, but its true. At times the only thing keeping me in this world has been the fact that I'd get caught before I could complete the act. Simple curiosity of what lies after death leads me to not really fear it, and I don't have a lot that I'd regret leaving behind in this world. My family and friends would be sad, but they'd get over it. I'm sure they'd remember, but 10 years from now I'd be surprised if it had a major impact on their lives. Well, family might, but to some extent I don't really care there. Otherwise, its either an easy way to not having to worry about anything, or it leads to an interesting development that I'd be very curious about finding out more about. Not about to let myself go like that though. So long as I can deal with life I'm not going to go making people upset, even temporarily, for no reason.