Are you frustrated with your neighbor being cruel? Is your boss being unfair at work, and you feel you have no way of dealing with him? I'm not suggesting you cast a spell on him or your neighbor, but you can use words to help the situation. Casting a spell has a negative connotation. It would be best if you weren't sticking pins into an effigy of your enemy, either. There aren't any rules in Neo-Paganism that you have to follow. However, there are ethics. One of them is, much like a doctor, to do no harm. The belief behind this is that whatever you send out (energy-wise), expect it to come back to you seven times.