Assuming you drink coffee every day, you must be asking yourself, "what's so special about National Coffee Day?" Well, unless you have absolute brand allegiance to Dunkin Donuts Coffee or Starbucks, it's possible to get a free cup of joe on this holiday. 7-11, Thornton's, and Krispy Kreme are all giving away free coffee today. Caribou Coffee and Publix supermarkets are hosting two-for-one deals, and if you really insist on drinking Starbucks, you can go to Barnes & Noble bookstore chains for two-for-one Starbucks coffee using this coupon. Happy coffee drinking! Cheers to Kaldi and his wacky goats.