In an effort to take the stress out of holiday shopping, The Skimm, a media company that helps Millennials live smarter, will open a pop-up boutique and e-commerce shop. The pop-up boutique, at 909 Broadway in New York, will be open Nov. 29 through Dec. 24. The e-commerce site goes live today at shop.theskimm.com. Dubbed the “Celebrate Smarter Shop,” both the pop-up and e-commerce shop will feature more than 150 fashion, fitness, accessory and home decor items. The  pop-up