It's not easy. Usually one has to be a quadriplegic to force themselves to practice, and then do so via help of a computer. You may want to try faking death by eating a blowfish and seeing if while you're in a deathlike state and paralyzed you can reach out to someone else v
You assume a power that has more to do with wish-fulfillment fantasies than reality, and then ask how to strengthen the power? I suppose you can practice in your dreams. Or while flying, but remember: NO CAPES!