When you are ready to go to sleep, go over what you did that day from the time you got up until you get into bed.

FORBES: Mental Exercises to Help Improve Your Memory

If you are doing it because it makes you sleep well at night to know that while the price may go down at least it won't go to zero, again, fine to own.

WSJ: The Experts: Should the Average Investor Buy Gold?

The troops are tired because they were anticipating the order to go and even though you try to sleep, usually, it's very restless, as you can imagine.

CNN: Grange: Troops 'on a high'