The Importance of Meditation
This goes for any ability from telepathy to future prediction. Without that clarity of mind, your abilities won't develop as they should. One of the most common ways to produce this clarity is through various types of meditation.
Meditation is a centuries old technique that teaches people to clear their mind and focus. Without that constant din in your head, you can work on focusing your thoughts on your own mental abilities. There are many different ways to meditate from classical to transcendental. There are people that will offer to teach your for money, books are available and countless web pages to read.