In honor of Lance Armstrong’s birthday, live strong this weekend. SEND Sugar Paper Holiday Cards What: So maybe it’s a little early, but if you buy your custom seasonal cards now, you’ll save 15 percent. Why: A discount ’tis the reason. Where: Online at sugarpaper.com. Enter code DCMERRY at checkout. BUY Wallpaper Selects What: The popular magazine is selling beautiful signed, limited-edition pics from its top photogs. Why: They’re wall flowers. Where: Online at eyestorm.com. WATCH Black Cab Sessions What: Your favorite indie acts perform a song in the back of a taxi. Think Badly Drawn Boy, The New Pornographers, The National, Bon Iver, and tons more. Why: Funnier than Taxicab Confessions. Where: Online at blackcabsessions.com. USE Flavortunes What: Custom e-mail invitations that enable your guests to choose the party playlist. Why: Here comes the brand new flava in your ear. Where: Online at flavortunes.com. READ Submerged: Tales from the Basin What: More than thirty women share their fiction, nonfiction, and poetry about their hair — some funny, some sad, and all to benefit Hurricane Katrina survivors. Why: It’s a hairy situation. Where: Online at shop.stepsisterpress.com.