[Help] What are your tips for making a pact with a spirit?

[Zander]

I'm considering making a pact, with a goetia demon to be specific, but I figured the process should be the same in broad strokes with other kinds of spirits so I'm hoping this can become a reference thread for future seekers of occult knowledge.

Looking for advice, warnings, preferred books, videos, recipes for simple magickal ink, and even short tutorials if you feel like it. I'm just looking for as much knowledge as I can get so I can prepare and do it properly.