I haven't had sleep problems in a long time (aside for the month after BD), but back when I used to, reading books in bed helped me. If a Grisham page-turner is too enveloping for you, to the point where you can't put the book down, maybe read biographies, histories, etc? If it was late enough, I couldn't keep my eyes open longer than 30-40 pages. I wouldn't recommend marriage/divorce help books in bed as that will not detach you from your sitch.
Me 38, WAW 30 D11 (former marriage) S2 T 8 years M 3 years BD 8/20/23 S 8/20/23