I check Pinterest, BookBub, GoodReads, friends, etc for suggestions to add to my To Read list on GoodReads. When I go to the library I change the list to sort a different way (By author alphabetically starting with Z for for one visit, by title starting with A the next visit, etc) and then I wander the stacks in order and pick the first 2 or 3 I find. I call it my "semi-organized" scavenger hunt.