We often get burned by things that “sound good on paper” for two reasons: Either the client rejects your idea because they can’t visualize it the way you do, or your idea is misinterpreted through lack of clarity and the client walks away with an alternative expectation of your idea (which is now more likely their idea). The root problem is that it’s not easy to align on an idea that exists solely in someone’s brain. In 99% of scenarios, it’s more than just turning letters into dollar signs.
http://blog.marvelapp.com/sketching-will-make-smarter-designer/?ref=webdesignernews.com/