From my experiences in the area (I was accidentally able to do pk once without actually intending to ;D) I have made a list of a few things that seem to be very useful and/or required to learn pk. I have made it rather simple - learn everything starting with the number 1 first (in parallell), and when you think you master it then move on to #2 in that group, then 3 etc.
This is extremely brief, but I'll probably make a more detailed one if it seems to be useful enough.
[you]Mind control abilities[/you]
1. Ability to clear the mind
2. Ability to keep the mind clear for long periods of time
3. Ability to disregard your feelings of what is physically possible
4. Ability to hold something physically "impossible" as truth
[you]Energy abilities[/you]
1. Ability to manipulate energy - ki balls etc
2. Ability to create objects with energy - holding pencils made of energy etc
[you]Feeling modification abilities[/you]
1. Tell muscles to move without moving them
2. Move the feeling of where the body is without moving bodyparts (a bit like slowly lifting your finger but letting the physical finger stay in place)
2b. Make it feel like arms/legs/etc are in a different position
3. Make it feel like fingers etc are touching each other even though they are not
[you]Relaxation/altered state abilities[/you]
1. Ability to enter trance
2. Ability to be in trance while moving around
Then, to do the psi stuff :
* Enter trance
* Gather lots of energy
* Empty your mind, and focus 100% on what you want to do
* Reach out with your "imaginary" hands or whatever and make something move
Any comments on this method would be appreciated