I love this phrase, "Dress the way you want to be addressed." Doesn't it say it all? We may tend to forget sometimes how much we are judged by our appearance. It even goes as far as affecting people’s opinion about how competent we are. So knowing what NOT to wear is a good starter to nailing the corporate look.
There are many benefits to using humor in the workplace. It allows you to connect better and get people's attention to pass on your message. Just hearing someone laugh is contagious and will brighten up the place. Yet it needs to be done correctly, with respect, or else humor can also be devastating.