Yay. I was able to do something good with my knowledge.
Me and a substitute at my school were having a nice philosophical discussion, when she brought up the fact that she had been having terrible nightmares of her dying(usually by car or by train). I thought for a moment then I told her a potion that I had made a while back, and told her to make a small broom from rope and twigs and put it under her pillow. She did this and came back to me two weeks later saying she hasn't had a nightmare since.
To me this is an accomplishment. I was able to help somebody. She is actually a very nice teacher. After she told me that she had no more nightmares, my friend asked her if she wanted to know how I knew how to get rid of them. So she said to her I was a witch and could see spirits, make energy balls, and go into the spirit world. The teacher didn't even care that I was a witch.