Often my mind starts spinning, usually worrying about what I have to do or how much money I'm about to spend, and I'm unable to get to sleep. I've developed a few strategies to help with insomnia, none of which are helping tonight.
First: I don't struggle with it for too long. If I notice I'm tossing & turning I move to the couch. I don't want to add to my worry thinking about waking my spouse.
Next: If there's a small task that needs doing I just get up and do it.
Finally: I listen to a podcast, usually a fiction sci fi or horror story, on the lowest volume. Seems to keep my mind busy enough to doze off.
If all fails: I get up and read, work, surf the net, spend money on eBay, whatever.