My rebound from Seroquel didn't last that long, but I would do sudoku, as well as attempt to read a book or text not on my computer. I just needed to find a way to tire myself out... and that was good enough to put me to sleep.

I don't like to exercise before sleep since that keeps me awake. The adrenaline rush and all.

You can draw/write, too. So basically, try anything to do with text or pen on paper. It kinda strains your eyes and the strain makes them want to close. Not sure if straining is good, but it can work if you're desperate for sleep.