Those with VW Bugs with personalized license plates that say stuff like "MY BUG" or something equally as stupid.
Those that propogate internet meme's.
OK, seriously, though:
At work, you'll be surprised at how little you have to worry about 99% of your work. Within one month, you'll have already forgotten about what you think is extremely important today, and so will your boss. So don't worry yourself into an ulcer or uberstress.