Actually here are a couple of this to think that I felt go together.
Always remember the Threefold Law and the Witches Rede then your magick will work for the good. Even if you get so mad at someone you think a hex or a curse is what you should do there is always another way to take care of problems without being concerned on what the backlash to yourself might be.
The Witches Rede, “Do as ye will, lest it harm none. ”