You have to slow your breathing, and get your heart rate to slow down. Picture the place you want to go in your mind. Feel yourself there while imagining the scents and sounds of the environment. Feel the buzzing energy start in your fingers and toes, traveling up your limbs to your head. When you feel the sudden rush of energy, followed by the euphoria and lightheadedness, let your body go slack. Feel yourself slipping into nothingness. And you should be where you wanted. It will take a lot of practice, patience, and effort on your part, but I believe in you.