This is a Quote from the dalai lama quoted in Sleeping, Dreaming and Dying, ed Francisco Varela, p 129
"Different factors are involved in the ability to recognize the dream as dream. One is diet. Specifically, your diet should be compatible with your own metabolism.
For example, in Tibetan medicine, one speaks of three elements: wind, bile, and phlegm. One or more of these elements are predominant in some people. You should have a diet that helps to maintain the balance among these various humors within the body.
Moreover, if your sleep is too deep, your dreams will not be very clear. In order to bring about clearer dreams and lighter sleep, you should eat somewhat less. In addition, as you’re falling asleep, you direct your awareness up to the forehead.
On the other hand, if your sleep is too light, this will also act as an obstacle for gaining success in this practice. In order to deepen your sleep, you should take heavier, oilier food; and as you’re falling asleep, you should direct your attention down to the vital energy center at the level of the navel or genitals.
If your dreams are not clear, as you’re falling asleep you should direct your awareness to the throat center."
(thank you to Mary Pat Mann!)
This is interesting, as I lately have taken the habit of falling asleep with my hands on my belly.
This illustrates how things work differently for every dreamer. I hope you are going to experiment with this and post the results here
Q