What you will need:
Fresh blood (can be any animal, no more than an hour old), wide space, 5 candles, lighter, music, a sacrifice (size should vary based on favor)
1) First draw a pentagram like the one shown, with the blood
2) Place one lit candle at each point of the pentagram
3) Play loud music to help the Demon find you (if you have summoned the Demon before in the same state music can be quite)
4) Make sure the sacrifice is ready for when the Demon appears (might take a minute for Demon to show up)
5) Present sacrifice to the Demon and ask favor
6) Dispose of the body accordingly
(Make sure there is only natural light during summoning)