If you have not joined the Dairy Queen Blizzard Fan Club, July would be a good time to do it. They announced on their Fabebook page that you will get an extra Buy One Get One Free Coupon in July if you are singing up as a new member. You normally get 6 coupons per year.
“Become a new Blizzard Fan Club member now! You’ll receive a welcome Buy One, Get One Free Blizzard Treat coupon in addition to our first-ever July BOGO on July 13!”