You have to get recording devices that are good quality and good video cameras with night vision and do it in the like pitch black dark and try to lure the spirits out so ya have fun and don't let ur imagination take control. Ohh if u find any thing let me know :) have fun and get scared.
Use digital recording devices and ask questions. If you are lucky you might catch some EVPs (electronic voice phenomena). Also take lots of pictures on your phones or digital cameras. Look closely for orbs. Have fun!