Shutterfly takes $20 off orders of $20 or more via coupon code "perkholiday". That's among the best dollar-off coupons we've seen from Shutterfly this year. (We saw $10 off $10 a month ago.) Shipping starts at 99 cents, but orders over $30 qualify for free shipping via coupon code "SHIP30" (the coupons stack). Deal ends October 30.

Update: The coupons do not stack as previously mentioned.