Sheila and Flibberti, Insomnia, yes, I know it. I go regularly at 10 pm. This insures me that I feel shattered by 10 pm. But I do wake up at around 4 - 4.30. I stopped bothering since, as you say, there's not much one va do about it. So I switch my best station, Classic FM. I take my Kindle and read. Sometimes, I'll go for a hot chocolate. Yet, the kitchen seems so gar and dark! So I stay reading and listening to the flow of Classical music. At least, that cuts my brain from reeling the same thoughts over and over again. I hate that. I tell my brain tat I don't see the point in doing it! After about 1/2 an hour, I shut the light, let the music cradle me for a little bit longer on a 10 or 20 minutes timer. I might doze off or I might just lie there until 6.30 am.
When I get up, I'm always happy of the new day with the prospect of practising the flute. It's such a lovely companion; yet hard to tame! Cheers to you both, Mic