Cool Tools has an interesting review of Mistake-Proofing: Designing Errors Out and, as is common with most book reviews on that site, provides some marvelous excerpts. My favorite one is a reminder of many a do-it-yourself project:
The best way to ensure the detection of a mistake is to make sure that something in the environment makes it very obvious that one has been made. A good example of an environmental cue is the inevitable "extra" parts that remain after a do-it-yourself repair project. These parts make it very clear that you have not reassembled the item correctly.