How do you perform telekinesis?

Take a small object, like a feather, and place it on a table. In your minds eye, see it float up. Try to impress this on reality, to make it happen. Concentrate, but dont overexert yourself. After about 10 minutes, stop and do it the next day. Do this until the feather lifts off the table. Then try to maintain it.then move onto heavier objects.