My sister was bemoaning the fact that she had procrastinated cleaning and organizing her house for a long time. Since she was planning to entertain, she felt a lot of pressure to get moving.

That afternoon she phoned, sounding glum.

"I went to the bookstore," she explained. "And I bought a book on how to get organized. I was all fired up, and decided to clean out all the shelves in the living room. While I was working, I found the same book. I had bought it a couple of years ago."