I read this years ago.
1. Make a list of quite chores you hate ( mine was ironing dress shirts).
2. When you can't sleep, get up.
3. Dress completly as if you are leaving the house.
4. Consult list, starting with most detested chore, perform chores 1 hour ( no cheating).
5. Go back to bed, within a few days insomia won't be a problem. When you wake up you'll know you have to do those chores. You'll groan & go back to sleep.