that depends entirely on what tradition you follow.
That's a question I'm still trying to answer. Philosophically, I draw from a variety of sources, but mainly from writers like Anton Levay and Asaneth Mason, which are left hand path. I've even come up with my own dichotomy and philosophy around self-preservation.
Regarding which deity I follow, at the moment, I speak to Hermes and Hecate, but Odin tends to be a constant source of information. I have had periodical times where I prayed to, and made incense offerings, to the lords of the left-hand path. But I'm always doubting myself and my ability to interact with them.
As for the Judeo-Christian tradition, I can't say that I get along with the Abrahamic god. His energy is like the way the sun gets at noon during the Summer. It's very wholesome, but imposing, like he's trying to dictate to you how the world is. Unfortunately, I feel like I have to work with him to connect to the other gods. I've explained this in an earlier post, but the reason being that modern occult books feel somewhat cheap and watered down to be "user friendly". So, I go for classic grimoires and have a nice collection of them.
I have a few books on Daoist magic, but haven't done anything with them.