Favorite go to. The power suit. Sophisticated and a bit sexy, charcoal gray/espressro suit with clean lines. Larger accessories add a little spice. More conservative look would include smaller earrings (hoops or even pearls) Wear with neutral shoes.
Once you're a working professional, it's important that you dress appropriately. Choose the ideal dressy top for yourself and in the event that you can't decide on what works, see this gallery to get best ideas of work dress.