Taking this a step further, when it comes to sales, the type of "mask" you use often is the phone. Over the phone, your presentation (your tone, speed, diction) can change depending upon the person on the other end - as it should.
Mirroring & matching, imitating the body language, tone, speed, diction of those you interact with, is an important facet of NLP and subsequently the art of persuasion - and as an aside, having preset rules to follow makes one feel as though they are playing a 'role' and acting, thereby increasing confidence as well.
However, often the customer "forgets" that leading to mindless bashing, but I guess that's a compromise. :)
But, anytime he'd ask someone for a favor or give instructions in an email, he'd always sign with "Robert M. Lastname III, Vice President"
Tacky, but material for countless inter-office jokes.
It costs about $15 for less than a ream and is usually sold as something like "resume paper" (300 sheets -- a ream is 500, a carton is 10 reams, and a carton of generic office paper should cost around $30 ~ $40). One pack will last you about a decade. For those of us in the Internet generation, if you have a call to send someone paper, that probably means you are doing Serious Business. The ROI on influencing Serious Business is just astounding.
Cheap copier paper, on the other hand, looks and feels like crap. The only reason you print stuff on paper is to communicate with another human being, and the paper is part of the message.
I wouldn't quite go as far as the business cards scene in American Psycho (http://www.youtube.com/watch?v=qoIvd3zzu4Y) though.