How to Summon a Demon?

First off, be very very careful! The fact that you call it a demon means that you want it to be evil, take precautions or you may encounter problems. Ask yourself, what exactly do I want to summon. You must know all the details of what you will bring forth, its physical description, its name, how to protect yourself from it. Feel free to create this traits, or recover them from dreams or visions.