The rules about what to wear to work are constantly changing, and it's hard to keep up. But even if your workplace has a 'business casual' dress code, never go to far with it. Obviously, clothes that are dirty, wrinkled, or too provocative are out. Transparency is good for financial dealings--but not for clothing! And unfortunately, unless the boss is sporting them, yoga pants and leggings are out. Cold-shoulder tops aren't cool. And baggy clothes and visible undies are just lame.