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[anagogy]

If you can avoid waking up via alarm clock, it helps a lot. Dream memories are subtle and easily lost with abrupt awakening. If you wake up slowly, you gradually cement them in your conscious memory. If you wake up and keep your eyes closed, you can remember the dream for a few minutes before getting up. And of course there are the basics: a dream journal -- even just jotting down a few words will do the trick like for example: blue house, flying machine, giant snake. That's usually enough to remember the gist of it later. Just write down the words that most trigger the memories.

I did the polyphasic sleep thing for a while -- didn't care much for it. I guess I never adjusted.