I'm a big fan of vintage style, especially cute 1940s and 1950s style dresses! I got this vintage sweater dress and the gold heart necklace at the San Francisco Vintage Expo last year, and the necklace was a steal at $5! I also love the length of the dress--a longer hemline feels sophisticated, especially for the office!
Dress and Necklace: Vintage Shoes: DSW
Here I am in black and white showing another necklace option. I would wear this look to work on a day that I had a presentation or big meeting--the look feels sophisticated, strong, and still feminine.