After I had helped a patron to find a biography of the duchess of Shewsbury, I asked her how she chose new books to read. She said that she actively consulted book reviews in the Sunday papers. The biography that she was taking though she had seen while visiting an historic house in England, decided that it was too heavy to buy there (and carry around for the rest of her holiday), so remembered it's details and came in to borrow it from us when she returned home to the Shore.
My husband listens to National Radio and picks up on some of the reviews there, leaves me little notes with suggestions to borrow and or buy for NS libraries to buy. The spelling of the author's names can be a bit wrong but he usually gets enough title info to be able to find the book. We nearly always have the book in stock or ardered already.