I have been attempting to access Kundalini Shakti energy the last few nights. In yoga, this is the energy that lies dormant at the base of your spine. If you can get it to flow up your spine, through your chakras, and out the top of your head, you will feel the burning wondrous union with God and also bliss.
I have not been successful yet but I am not really trying either. It just seems that when I was saying my new mantra 'OM Namah Shivaya' the last few nights, the Kundalini energy began moving upward. Two nights ago it reached my heart chakra level and last night, it reached my third eye chakra level. It might just be a distraction used by my ego to stop saying this mantra but for now I am waiting to see what happens.
By the way, this particular mantra is used to reduce the size of one's ego. Initially, or when you begin to use it, you might find great resistance to it, and maybe just maybe this resistance comes from the ego which fears any reduction in its size.
I am not an expert by any means on these subjects, just an experimenter who wants to get rid of ego blocks so I can write more and better.