I want to agree with Legally Blonde (just joking) but I barfed when I saw someone suggest "Wicked." I mean, seriously.
Tommonste, Shep Meade's book "How To Succeed In Business Without Really Trying" is a short masterpiece. I have poured over it many times. There is so much material in the book that isn't in the musical (including the entire character Spruance Bibber) but my favorite part is the suggestion "How To Create Your Portfolio" which went something like:
"If you are applying for a job with another company as an advertising director, you'll need a portfolio showing your work, your style and your potential. Every major company has a mountain of artwork, usually stored in the basement. Choose carefully, for this work will have to represent you!"
http://www.broadwayworld.com/board/readmessage.cfm?thread=972787#3631451
http://www.broadwayworld.com/board/readmessage.cfm?thread=963561#3533883
http://www.broadwayworld.com/board/readmessage.cfm?thread=955158#3440952
http://www.broadwayworld.com/board/readmessage.cfm?thread=954269#3427915
http://www.broadwayworld.com/board/readmessage.cfm?thread=955012#3441622
http://www.broadwayworld.com/board/readmessage.cfm?thread=954344#3428699