Just show the coupon in-store before 11 AM and get a free bagel. Note: Offer may discriminate against pregnant women (see legalese).
Legalese: Good for one free bagel (no purchase necessary). Additional charge for gourmet, premium, bagel thin, or Powerbagel (R). Limit one coupon per person. Coupon may only be used once per day per week. Valid at participating Einstein Bros(R) locations only Not valid with other special offers. No reproduction allowed. Cash redemption 1/20 of one cent. Applicable taxes paid by bearer.
Oh, yeah, and there's a coupon for a $2 breakfast (bagel, shmear, and coffee) for Tuesdays before 11 AM on the page as well.