Before getting an ereader I used to mainly read library books. Somehow knowing I don't have them around forever, makes me more intent to finish it.
I can always get back to a book I own, and since I've started to buy e-books, I feel I've had a greater tendency to not quite finish a book - or perhaps I just notice it more - a library book is free, while I feel I should get my money's worth on books I buy
