Number 13
If you're a female, dress appropriately. Don't wear fish-net stockings, crop tops, black knee-high boots. That dress is great for the pubs and nightclubs not for a professional office environment. And we don't need to know how your breasts move when you're on a treadmill or how you deal with hair removal.
If you're a bloke, the cubicle is not a change room and if you have a company issued t-shirt, take it home and wash it occassionally rather than leaving it on the floor of your cubicle and changing into it when you arrive to work. I never saw that guy take that shirt home to be washed.