Be sure to take good care of books you have been loaned, and read them in a timely fashion so you don't forget about them and leave them gathering dust on a shelf for the next year.
Electronically purchase the book. With the advent of portable e-readers and smartphones over the last several years, electronically published editions of print books are becoming more and more common. It also means that the book can be taken with you anywhere where your phone/kindle/tablet/iPod is.