Magic Forums

By now I have a pretty good idea of what is possible and impossible when it comes to magic. I know that you can't alter your DNA, turn into any other different sort of creature, control elements, teleport, change your appearance (well, I guess you could use a glamour to make others perceive you a bit differently, but those have limits), bend the laws of reality, create real things out of thin air, create life, control other people, etc., and I could list more. That's all fine and dandy, but I would like more information on what exactly I can and can't do to avoid being fooled by trick spells and the like in the future. What sort of things can I definitely do or not do?