It is important to remember that using a checklist will never let you determine with certainty whether or not a use is fair. It can, however, help you organize and, importantly, document your thinking. It's a great idea to use and print a fair use checklist whenever you are dealing with a tricky fair use situation. Take the time to document your thinking in case of a future challenge!
Scale: Michael Brewer & ALA Office of Information Technology Policy, CC BY-NC-SA 3.0