There are also many crystals in which you can use to amplify your psychic awareness. Amethyst and Quartz are two that you can use. Also as far as increasing your awareness try meditating using a picture or an object and see what you can pick up from it. There's no right and wrong in the matter, remember that. Also be careful when contacting the dead. You need some form of protection when doing so. There are two things that I like to do in order to prepare myself for negative energies. The first is that I imagine a veil of light washing over my body, and the other is that I draw a circle, either with my mind or literally, around myself. You can use duck tape if you need to do it physically. The reason I do this is sometimes I need a physical representation for the spiritual energy that is already there. Lastly, be careful who you talk to. I've been lied to many times by the dead, and each time I've had to confront them. It can be mentally dangerous so please please please be prepared when doing these things.
Blessed be and Good luck!