how do you decide what books to read?

oh! i have many devious methods. i get recs from friends/family/mutuals, i plough through the entire works of authors who have written one book i've liked, i check rec lists e.g. on library websites or goodreads, and awards lists e.g. the man booker prize, but my fave way is to go and browse in a bookstore for 7 hours, scope out the books i'd like to read, write them down, then go home and borrow them from my local library (for free!!! support your local libraries kids!!!!) and THEN only if they're great will i keep a lookout for them in second hand stores and eventually get myself a copy