Have you determined WHY you feel the urge to do these things?

Ask yourself: What does cutting do for me that makes it so tempting?

Then find a non-destructive activity that gives you the same effect.

For example, whenever I feel angered by someone or the urge to hurt someone, I find a bug and squash it, visualizing myself squashing the individual that has me agitated. Or I write nasty notes to them, then tear the notes up.