The best method to develop such and other abilities is to receive guidance and help by a teacher. To find someone who initiates you is unfortunately difficult.
The most used technique for traveling is the projection of mind/mental body and later also the astral body to a point outside your physical body. This works with concentration, meditation, time and enough training. You can project yourself above your physical body or for example in front of you. if you do this you can experience a strong… http://bit.ly/7MmZro