I'm a big fan of Vianna Stibal and her work with Theta Healing. She created a whole system of applications for the Theta brainwave state. These include psychic work (it makes psychic readings surprisingly easier to do), subconscious belief replacement, Law of Attraction manifestation work and physical and emotional healing.
Here's a visualization that achieves the same effect as Vianna's more elaborate visualization. It will slow your brainwaves to somewhere between 4 and 8 cycles per second. In the video, I also include tips for intuitive development using this state.
1. Close your eyes and relax. Point your eyes toward the third eye point between the eyebrows.
2. Imagine yourself as a ball of white light in the center of your chest.
3. Travel upward to the throat, gathering your body consciousness into your ball. You're growing bigger and brighter.
4. Go through the head, all the way up to the crown. You're growing brighter and brighter.
5. Pop out of the crown of your head and go up about three feet. Look around.
6. Go past the sun and through millions of stars and galaxies.
7. Go past the universe.
8. In the distance, you see a ball of bluish-white light. Go toward it. It's getting bigger and bigger.
9. By the time you get near it, it's huge. Enter the light.
10. You're in a new plane. Keep going until all you experience is this light.
11. Let the light rinse you. Bathe in it.
You're now in a Theta brainwave state. Meditate here. Visualize a goal here. Ask questions of the universe here.
Be sure to keep yourself grounded if you do this a lot. You can start the visualization by going through the body and down to the feet first. Then, go a few hundred feet into the Earth and attach a chord to yourself and to a large rock. You can then go back up through the feet, through the chest, and continue the visualization from step 1.
In this video, I offer a lot of tips for using this state to develop your intuition. If you're interested in Vianna's work, check out ThetaHealing.com. She spills the beans in her books. Good stuff.