When I decided to improve my computer skills, I threw myself into it with enthusiasm. Every week I'd check out five or six instructional books from the library.

After about a month the librarian commented, "Wow! You must really be getting knowledgeable by now."

"Thanks," I said. "How can you tell?"

The librarian explained, "Only two of the books you're checking out this week have For Dummies in their titles."