Could we be more excited for the Season 4 premiere of “Mad Men” this Sunday? Probably not. We’ll be working for the weekend, and since our work involves blogging about “Mad Men” (yippee!) you’ll get some style inspiration to tide you over. Betty Draper-fy yourself with some vintage-inspired fashions. Think: floral cocktail dresses, costume jewelry, and a bright pink nail polish, which Betty favors quite a bit if you look closely throughout the seasons.