If you can think of it, it is possible.
Regarding to exiting body, the easiest way is to learn to perform a shamanic journey. Its the main method that shamans use to exit their body and communicate with spirits, also travel the universe and through time.
Also, a daily practice of developing your abilities is a must if you desire to evolve. Energy work, work with focus, visualization, meditation, all these practices are very popular in many traditions.
