Snowy, below is what I think about or do:
To help keep your mind on mundane things instead of things that will keep you awake.. try counting "1-I'm dreaming, 2-I'm dreaming, etc." or use what I call the
alphabet method:
I'll think of the letter "a", then picture my picking an apple from a tree (or simply picture an apple), think of the letter "b", then picture a balloon floating on the wind (or simply picture a balloon), etc. until "z" and then start at "a" again picturing something different.
For variation, I'll sometimes think of the letter "a", then think of a
name that begins with the letter "a" (such as "Adam"), then think of the letter "b" ("Brian"), etc. until "z" and then start again at "a" thinking of a
different name. You can also do all female names first and then switch to all male names or vice versa.
http://dreamviews.com/community/images/smilies/grin.gif
I also sometimes try to envision/daydream something tactile.. such as horseback riding.. i.e., feeling the reins in my hands, the wind on my face, my legs gripping the saddle, etc. Heck now that I type this, I think next time I'll envision myself playing jacks (throwing the jacks on the ground, tossing the ball in the air, scooping up a jack or jacks and then catching the ball).
More info can be found in my technique if you're interested (see my sig below).