I DO try. I try for about an hour and then I give up because Im not tired or weary at all. Trust me, I want to sleep. Badly!
Also, I think it has to do with other things. Like Im home these days so Im not as tired as I used to be before. Ive got to increase my activity and think about going back to work. This is boring...
Do you workout? Try pushing yourself a little more, spend an extra half hour, that'll tire your body and send out the green signal for sleep to your mind.