Self-Injury Support Group

I've been trying to stop also.I found this list at mirror-mirror.org. I hope something on the list works for you.
deep breathing
relaxation techniques
call a friend, your therapist or a crisis line
try not be be alone (visit a friend, go shopping, etc.)
take a hot bath
listen to music
go for a walk
write in a journal
wear an elastic around wrist and snap it when you have the urge to harm yourself
some people find it helpful to draw red lines on themselves with washable markers instead of cutting themselves
hold ice cubes in your hands - the cold causes pain in your hands, but it is not dangerous or harmful (some people find it relieves the urge to harm themselves for that moment)
punching a bed or a pillow (when nothing but a physical outlet for your anger and frustration will work).
scratch draw a picture on a thick piece of wood or use a screw driver and stab at the piece of wood. (can be another physical way to release your emotions without harming yourself.)
avoid temptation (i.e. avoiding the area in CVS where the razor blades are kept, etc.)
try to find your own creative ways as outlets for emotions.
learn to confront others/making your own feelings known instead of keeping them inside
go outside and scream and yell
take up a sport (a form of exercise can help you release tension, etc.)
work with paint, clay, play-doo, etc. (the person who suggested this mentioned that they would make a big sculpture and do whatever they wanted to it. They said it was helpful to calm the urge to self-injure, plus it gave them some idea of what might be underlying the pain.
draw a picture of what or who is making you angry
instead of harming yourself, try massaging the area you want to harm with massage oils or creams, reminding yourself that you are special and you deserve to treat yourself and your body with love and respect
go to church or your place of worship
wear a pipe cleaner or something that will fit on the places that you injure. One person did this as a way to remind herself that she could call someone instead of hurting herself and that she had other ways to cope.
break the object that you use to self-injure as a way to show that you have control over it.
write a letter to the person(s) that have hurt you and express how they made you feel. Theses letters do not have to be in perfect form and you do not have to please anyone but yourself. You do not have to give these letters to the people, but it is a great way to release the feelings that you are carrying within. After you write the letters, you can decide then what to do with them. Some people find destroying the letters help (i.e. tear them up, throw them in a lake, etc.)
do some household chores (i.e. cleaning)
do some cooking
try some sewing, crossstitch, etc.
recite a poem, prayer or anything else familiar the comforts you multiple times
write down all your positive points and why you do not deserve to be hurt
write in your journal why you want to hurt yourself and if you have hurt yourself, write down what caused it to happen so in the future you can prevent it from happenings - or find out what your triggers were
Play some kind of musical instrument. Even if you don't really know how to play, picking out tunes is a way to concentrate and help get rid of the urge to harm yourself.
yoga
allow yourself to cry. Getting the tears out can make you feel better. It allows the inside to release, as opposed to self abuse. Picture your "ickies" pouring out as you cry.
Take a shower
write down a word best associated with what you are feeling (i.e. horrible, sad, lonely, angry) and continue to write it down, over and over. Sometimes when you do that, the words looks silly etc., and it puts humor or a smile in your life.
sing a song on what you are feeling. It's another way to get it outside. Shout if you are made, etc. Let the words just come to you.
Scribble on paper. Clutch the pen in your fist. It's a way to diffuse it on to paper. (Get a few sheets so they don't tear.)
Take item you are self injurying with and use it against something else. For example, if you are using a razor blade, rip it across a towel. Sometimes seeing what "can" be done to an object can make a person think twice about using it on themselves. Can also give the feeling of "doing it"...the tangible aspect.
Make a list of reasons why you are going to stop cutting. Every time you get the urge, read the list to remind yourself why you shouldn't. Also remember to put on that list that you do not deserve to hurt yourself. You are important and special and you do not deserve to be hurt.

I like MightyMouse's suggestions; you should try those.

hunny what has worked for me is ice and salt.. it creates more pain then just ice.. try that.. if u cant stop u need to seek help from an adult u trust.. if not ur parents then cousins or aunts and uncles..
just please get help before its too late hunny!!

ill be praying for u hunny...