The 00:45 Shipping Forecast signals the earliest time I'm likely to go to sleep (terrible insomnia). 'Viking, North Utsire, South Utsire, Fprties, Cromarty, Forth and Tyne...' - it's poetic, rhythmic and repetitive. Just like a children's bedtime story or a prayer.
Gaelic speaking radio stations.
I love polyphony (Renaissance) music - Gregorian Chant or Plainsong is great, but I love the what the later composers created - any fans would do well to listen to Luis de Victoria's Magnum Mysterium, as the way the different parts come in and intertwine are beautiful. There's absolutely nothing wrong with the compositions of Palestrina, but later composers tended to break the set rules of religious music in ways that are more modern to our ears and the tension set up from the discordances then gives a more satisfying release.
When TwatCat decides he is cold and neglected loves me and comes and flumps his bulk against my hip, purring, then goes to sleep and turns into a warm, furry, heavy lump like an oversized beanbag so I can scoop him up and drag him towards my ribcage.
I like having a pillow between my knees to sleep. Not sure if it actually reduces pain, but it's nice - if I could get away with it (and afford it) I'd love to have a massive U shaped body pillow to flop over. Or a giant padded donut cat bed - those ungrateful buggers don't appreciate what luxury they have been offered and refused in favour of random piles of clean washing.
Birdsong. Especially the small ones - Wrens, Robins, etc. I love the idea that they are shouting to the world that they are alive/made it through the night.
The sounds of animals - cows, sheep, horses just doing what they do, female chickens chattering to each other (the announcement that an egg has arrived is hilarious, but not very relaxing) and wildlife. The smells as well - the smell of manure, hay and straw.
The sound of cleaning in silence. Sweeping, wiping, washing up, the washing machine.
And, completely different smells - workshops. Woodworking ones, metalworking, garages - all mean fixing and repairing things until they work.
If I'm awake, I feel peaceful when fixing something, cleaning things or putting together flatpacks. DP leaves me alone when I'm doing something like that precisely because he knows I enjoy it without constant noise or interruptions.