[blakestein]

This is my situation as well. I can't just decide to go take a nap, and when I do nap it's sort of spontaneous while I'm watching sports or reading a book. My wife on the other hand can pretty much just choose to go to sleep.

[ggiaco]

From personal experience, it helps to actually get to a point that you're physically exhausted in order to fall asleep easily. Exercise really helps!