I've recently learned a great trick. Of course, I can't find the website now, it's buried in my thousands of supposedly-organized bookmarks. The trick is tickling your amydgala.
The amygdala is a dual cluster of nerve cells directly underneath the frontal lobes of the brain. If you imagine a spot about an inch behind where your fingers touch between your eyebrows, that's it. The amygdala is part of the limbic system or primitive part of the brain. It controls strong emotions such as the fight-or-flight response and is also involved in pleasure, such as orgasm. It is also a gateway to the higher functions of the frontal lobes and the cerebral cortex.
Scientists have known for a long time that by running a current through electrodes implanted in the amygdala, both panic and pleasure can be induced. Some have also noticed that some subjects have reported OBEs, spiritual insights and feelings of love and oneness. By using the power of your own visualization, you can do this yourself. Visualize that spot an inch behind your eyebrows. Imagine that spot being tickled with a feather. Or, imagine a beam of lovelight entering your skull and gently bathing and energizing that area. It's almost a form of masturbation, except that the pleasure isn't sexual.
This is something that just takes a little practice, and you can do it anywhere and anytime. It's a great way to take a 30-second vacation. I'm told that this practice can lead to "popping" the frontal lobes into amazing experiences such as connection with the Divine and OBEs. That hasn't happened for me yet, but if it does I'll let you know.