These have revolutionized my life.

Book Darts These paper-thin, 1" long bronze markers slide onto the page and securely stay in place. They are perfect for use as non-slipping bookmarks that can even be positioned to point to a specific line. Unobtrusive and indefinitely reusable, they eliminate the need for bent corners, paper clips, underlining, highlighting, sticky papers, etc. A good-quality item that is ideal for anyone doing research, they are popular with students, lawyers, executives, research assistants, voracious readers, etc. Tin of 50 markers. Link... Until I RAN OUT, that is. Bah.