The best method of remembering your dreams is that as soon as you wake up start writing about the dream you just had. You only have to remember bits and pieces of it but that is just enough for you to suddenly remember the rest of the dream.
Never heard of the light idea.
Psychologists also say that if you wake up right after going through REM then you will wake up refreshed and not feeling sleepy. Sleeping beyond REM only makes you tired as an hour of sleeping drains more energy than walking about 5 miles all at once in a day. Something to do with how the mind works and refreshes your body. This also goes for waking up before REM as your body won't refresh itself without going through REM. Plus, REM occurs at the same time everytime yo go to sleep. So if you usually sleep only 8 hours a day, then your REM will most likely occur at the same time in those 8 hours but should you sleep only 4 hours you might not even go into REM or even wake up during REM which is actually real bad for you as you will feel like shit for the rest of the day. This goes for sleeping beyond the 8 hours and instead sleep for 9 hours then you have wasted energy you just gain back.
If you were actually to sleep exactly 8 hours a day then you, theoritically, wouldn't need anything to 'wake you up'. The whole sleeping and dream theories are confusing but they good sense to me. Now if I only I could put them to good practice. My sleep schedule is so off the charts these day that I am lucky to get an hour of sleep before having to wake up.
