To the guest to recommended St John's Wort, a caution - don't use it if you are on any other medication, even antibiotics or the contraceptive pill, as SJW interferes with the liver function, I think making it clear drugs more quickly and therefore making the standard dose less effective.

I would second the person who mentioned the sunrise alarm clocks if you have trouble with hypersomnia in the winter - before I had kids to wake me up at random intervals I found it invaluable in the winter (I have SAD).

Bagpuss