wow xxmessedupxx, this is a really good thread and those are all great ideas/methods/activities/exercises etc. Seriously, all of that is such great advice! As soon as I have posted enough posts to really give rep, I will rep you, because you definitely deserve it!
I especially liked the imitating selfharm section, I find that kind of thing really helpful. But one of the most helpful things is to have a friend who you can tell almost anything to, who you can describe your feeling to and who is always there to support you. With these kind of feelings, it's really important to have someone to talk to, just try and make sure that the other person can handle your feelings as well - i.e that they're a pretty balanced person and have the ability to support you.
And a journal, as was suggested above, is also a really great idea, because you can write down exactly how you feel and try and work through your own feelings at the same time, often it can help.
And anyone who ever wants a chat or anything, you're welcome to PM if you want to anytime.