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.
Searching around book stores (e.g. National Book Store, Booksale, Fully Booked, and other physical book outlets), Goodreads (including lists, and even checking reviews by S. Craig Zahler and Cardinal West), YouTube channels like Cardinal West, Jesse the Reader, etc., TV Tropes, and the occasional Reddit post and Telegram chat. I once even searched around my school’s library.