I bet you guys and gals get this question asked a lot " How to Summon " but my question isn't how to summon but it's how do I communicate with the spirit and how do I befriend them so that I may ask them to work with me?
This is an interesting question. I think the easiest way of communicating with a spirit would probably be through divination or scrying. But it would depend on what psychic sense you have the most developed as well.
How to befriend them really depends on the type of spirit they are. And in working with them they might ask for offerings, the type of offerings also depends on the type of spirit and what they like.