Entering the Theta State quickly

[Hagcin]

using pure focus to ie, focusing on breath takes a while to bring me to a theta state..

I read this article from, theta healing which gives a simple technique to enter a theta state quickly. It involves binging consciences through the crown Chara above the head.  Then connecting with the higher self, god head, etc.  
http://energy-spiritual-healing.com/theta-healing.htm
Iv also seen Taoist practices which looked some what similar...if any one could recommend me to a book or website on the subject id be grateful.

Id be interested to hear if this is a practice with is regularly used by people, and if so how do you use it in your daily life. Also is it a good method for projecting? And what are the limitations / downsides of this kind of meditation.

If there are other ways people use to enter deep trances quickly id like to head them. Thanks! I'm going to keep experimenting with it... Happy projecting all...