For a while I found that I slept better on the couch than in my bed. I think it just comes from having bad associations between your bed and insomnia. Keep working on it, it should get easier over time. Just tell yourself you can sleep perfectly fine elsewhere, so you can in your bed too. You'll get there.

Agree with LittleSadie. This is way more common than you might think. We spend hour after frusrating hour tossing and turning in our own bed, then get up and go to the couch and fall sound asleep because we're so tired. This is not dissimilar to what Pavlov did with the bell and feeding his dogs ... it's a conditioned response.

Some insomniacs can't sleep in their own bed, but fall asleep no problem in a motel, in a tent, on the couch, in a big chair ...anywhere but their own bed, which has that subconscious association.

If you want to sleep in your bed, you should resist the urge to sleep anywhere else. If you're on the couch/chair/wherever and you start to feel drowsy, head to your own bed. Eventually you will sleep and in your own bed too. Then the conditioned response becomes associated where you want it.