A successful tool is one that was used to do something undreamt of by its author.
“I have a specialized racing bike, which is great because it has a solid build, is comfortable to ride, and is lightweight.”
“I don't know if it's a romantic comedy but I'm in the beginning of the first of the season of 'The West Wing.' We shot it last year. I don't know. If anyone asks me to be in one, I'll jump on it.”