Vegetarianism and a hair-dryer stashed in my desk at work. Seriously.

When I stopped eating meat, my BO became much less pronounced. I've been told that my BO smells lightly of cumin (the spice.)
And use the hairdryer to dry out your pits & crotch (in the bathroom if you don't have a lockable office.) I haven't had a single saddlesore since I started doing this