Wear things more than once. Change out of your work clothes as soon as you get home, turn them inside out and hang them in a well ventilated space (this only works if they are not visibly dirty of course) and rotate through a few outfits over the week. As long as you're careful with personal hygiene, you can get two or three wears out of a shirt/dress and a couple more out of pants/skirts with this method.