Update your suits. Many of us working women tend to find one suit and wear it to death. But if you're really creative, you'll find more ways to get that "suit" look by mixing and matching jackets, pants and skirts.
Take a look at your basic suit and see if there aren't ways to make it look fresh this fall. Jackets can provide a major style shift. If you're still wearing boxy and baggy jackets, then you'll look boxy and baggy.