OK. I don't really know many forms of psi. all i konw is the psi ball, psi wheel, tk, remote viewing. what are some other kinds?

Psi can generally be divided into the following fields:

Clairaudience- ability to hear things outside the normal range of hearing
Clairvoyance- ability to perceive distant object, people, places, and energy usually undetectable by the human eye; its usually reported in sight
Psychokinesis- ability to move objects without direct contact
Telepathy- ability to communicate mind to mind

Psiballs, which I personally don't believe in, and psi wheels, which are merely tools to measure PK, are classified into psychokinesis. As for remote viewing, it's merely clairvoyance performed under scientific protocol.
A list of other areas studied by parapsychologists can be found here.
http://en.wikipedia.org/wiki/Parapsychology_basic_topics

got nothing else to add XD check out psipog.net it has a list of most psi abilities aswell as forums and guides on where to begin

Thanks.

There's also psychometry, the ability to 'read' the past of an object and the lives it has been part of.

Depending on how you experience it that would either fall into clairvoyance or clairaudience.