I've found the best way to clear my mind before sleep is read something completely unrelated to anything else that requires no subsequent thinking. Sometimes owner's manuals for some new simple gadget. But the best by far is the short stories in Peck's series of Bad Boy stories. He wrote them for his Newspaper in the 1880s to increase circulation. They are 3-4 pages, a 5 or 10 minute read, with delightful illustrations. The Bad Boy is a teenager always getting into trouble, like putting signs in the grocer's produce -- "Cabbage the cat has slept in, 5 cents". The bad boy's father is a drunk, his mother is a saint, the grocer is a cheat, the preacher is a hypocrite. The bad boy lines his father's had with limburger cheese. He wraps a card deck in his father's pocket handkerchief and soaks it with rum so his church speech goes haywire. My favorite is when he learns the grocer has rigged a darning needle beneath a hole in the counter where the bad boy sits, with a string to pull and stab the bad boy. The bad boy puts a piece of wood in his pocket and sits down. While the grocer is leaning down to see what is wrong, the bad boy gives up his seat to the preacher who has just strolled in, the preacher gets stabbed, and the bad boy leaves as they are rolling around the floor.
They are not politically correct by any means, but they were in a family newspaper in the 1880s.
There are probably thousands of similar books. Find any collection of 5 minute reads, none with cliffhanger ends. Nothing does better at separating daytime thinking from nighttime nothing.