Can't sleep

I never seem to be able to get to sleep any more. After my first operation, over 3 years ago now, I couldn't sleep in my bed any more, and my daughter took it over when I started sleeping on the couch. Since I couldn't sleep, I took to leaving the TV on all night. 
Now, if the TV is off, I can't sleep at all, and I am still sleeping on the couch, when I sleep at all. The bed I used to sleep in is all but ruined, and the bed that my daughter had is ruined, so I have no bed.
I'm up half the night, too tired to really do anything, and spend most of the day too tired to do much either. I'm never comfortable. Even if I was peaceful of mind, I have nowhere to be peaceful physically.
It is very frustrating.