This is one of the lesser fashion evils suffered by IT denizens, but astute observers will still notice black shoes and a brown belt. It messes with your fashion feng shui and it also tells others that you don't pay attention to details.
If you're the type of maverick who's ever gone to a formal event in a tuxedo t-shirt or a gown and Chuck Taylors, then you'll probably benefit from this list. It could potentially make a difference in your future earning potential. Seriously.