I think I’ve been blacklisted and/or heavily fined by at least 6 libraries in my lifetime, and I’m at the point where I just steal borrow books from my friends who have bad memories and generously donate to many a B&N employee’s 401K. If I can find a library who will trust me with their books, I’ll make sure to download this handy little app for OSX called Library Books, which syncs your record of borrowed books with your library’s catalogue, then adds the due dates of said books to your iCal so you’ll never miss another return again. There are hundreds of supported libraries worldwide, so the chances that your local is on there are pretty good. Whether or not you find the motivation to actually take them back, however, is all on you.