Self Harm

I quietly deal with self harm, and I have a long time...it's nothing like cutting, but I've intentionally brusied myself before and have bitten my arms, poked myself with a pencil, or dug my nail into my thumb inorder to reprimand myself. I don't come from an abusive household- in fact, my parents are very loving, so I don't really know why I feel compelled to punish myself like this sometimes. Does anyone have good coping methods for dealing with self harm? I know my case isn't really that dramatic, but it still worries me and I don't want to get to a place where I feel like I need to cut myself.