Also, lately, I've been doing this more often, and I find myself drained, feeling out of energy, and very weak. I know this is due to the way I practice magic. I just need advice on how to continue.
I disagree with the personal gain thing. I think it's completely okay to perform magick for yourself to make your life better, just not at the malicious expense of another person. You may be feeling drained because you are not grounding, centering, and replenishing your energy sources after performing magick.