While you're waiting for Mad Men to start on August 16 (a bit later start this season than last) you can always rewatch Season 2 on DVD to make the time go faster. This is fun, too.
AMC's website has an interactive flash widget where you can create your own Mad Men character, dress them up in 60s hairstyles, fashions, and accessories and pick a background setting (the Sterling Cooper office or maybe a swank cocktail party?). Will you be a Peggy or a Joan? And you thought playing paper dolls was just for kids :)