Let go of what happened today, forgive yourself for what you did, and focus on making tommorrow better. Stay away from the triggers if you can. Listen to/watch anything else you can think of (I use Looney Tunes...naturally). Make a safety plan to call someone who understands, when you feel the urge to cut. If you can't think of someone to call then post here, or go to the 24 hour support chat on www.1in6.org.
They've literally saved my life a couple of times. Let us know how you're doing. We all have your back.
"Carry on my wayward son
There'll be peace when you are done
Lay your weary head to rest
Don't you cry no more"Kansas