wiki or google the following;

visualization
energy work
tantra
massage
sacred space
and perhaps astral projection

for me, i find it very helpful to gaze into someone eyes. focusing on the sound of their voice is also useful, especially in conjunction with other things...

mix and match and see what works for you...

I suggest the book "The Occult: A History" by Colin Wilson as a starting point. Wilson provides many convincing proofs of the reality of "paranormal" activity, as well as many references for further research.

For a more traditional approach, all religions have a long tradition of mystical communication. Open your mind to the wisdom of the ages; although, in my opinion, your quest will be more fruitful if you restrain yourself to a particular faith tradition. It's like dungeons & dragons, if you'll pardon the dorky reference. A character with 10 levels in wizard is going to be better than one with 1 level in each class. Likewise, if you devote yourself primarily to Christianity, or Buddhism or whatever, you're actually going to learn more than if you have an only shallow understanding of several traditions.

The only thing I've seen work is D&D, and I've looked around.