Social media (goodreads/tiktok/reddit)? Colleagues? Friends? Browsing the library/bookstore? Asking for recommendations from staff at libraries/bookstores?
BONUS: if you can remember, how did you find books you really enjoyed?
I realized a lot of my favorite book recs came from reddit. I was a subscriber of r/books and picked up some really good books there. Piranesi by Susanna Clarke is an example.
Podcasts (interviews, recommendations), blog and newspaper reviews, references in other books I’ve read or from authors/personalities I like
Podcasts are my biggest source for recommendations. That and if I find a movie or show I like, I look up the source material or related books in the same universe.