Join the Xmen, they have a safe place for people with special "talents".

Try meditation.There are cd's that help with meditation.There are also books that give tips on how to open up psychic abilities.

seems you are doing great so far
it is all just practise
we need to relearn how to use that part of our brain
and like learning anything , the more we use it , the easier it becomes
so do little games
like asking someone to hide something under a cup and you have to feel what cup it is under , or always practise guessing who is on the phone before you lift it up etc
all these little things help

Use you imagination more, close your eyes and imagine walking through the wall and into the room next door and walk about in there see what's on the table ...really vividly imagine you are there and later go check for real to see if everything is as you saw it.

yes it is quite possible, especially at your age. you posses the intellect to be able to learn, and the need to want to learn. there is a book called "seeing with the minds eye". i dont know if it is still in print or not, so you might have to search it up in a used book store, or on amazon.com. once you open the minds eye as you have started doing, you will start seeing things as they really are. you will be able to tell when people are lying to you, you will be able to read peoples emotions, etc. it is a wonderful thing, but it can be a curse as well(trust me i know).
the human brain is a fantastic creation, far superior to any computer that man has ever, or will ever create, given proper development. understand though that it will not be easy, and people will throw roadblocks up in front of you.
one more thing, even as you develop your mental abilities, never forget god, and ask him to guide your development.

meditation
yoga

I train psychokinesis by putting a broom on the floor, concentrating, stretching out my hand, and saying "Accio broom!"
No results so far. I'll keep you updated.

There are lots of ways, really. It depends on which you like best. But the only way to do that is to try different methods out, of course.
I keep seeing meditation suggested here. That is a good method for deepening one's awareness, and thus getting in touch with abilities. But it's not right for everyone. Some people just can't stand it. For example, I could never get the leg position right, and the meditation itself just didn't seem to do it for me.
Practice has also been suggested by someone here. That, too, can be useful, but if you get frustrated when you find that you can't make it work instantly, it might be a struggle to continue until you get it right.
But the real trick to using these abilities lies in broadening your own awareness of existence. Meditation does that, but any method by which you learn truths about what is, yourself, life, etc. will help. Just keep your eyes, ears, and mind open to understand your place in existence as much as possible. Think deep thoughts. Question the obvious. Speculate, and don't be afraid to ask a spiritual guide if you are ever not sure of anything. Good luck!
-------
You know something? Why is it that top contributors always seem to be found outside of the topics they are best in?

I have a friend who is a Psychic, e-mail me and let's talk.

There are lots of way.It all depends on u which u like most.. But most effective way to do a psychic course, meditation and yoga.But the real trick to using these abilities lies in broadening your own awareness of existence. But age is big factor to choose an effective trick.