Today only, January 6th, from 1PM-7PM, you can use the coupon found here to snag 20% off your entire purchase at Michaels including sale items (note that exclusions do apply). Just go here to print the coupon or pull it up on your smartphone while shopping.
Also, note that you can print a coupon valid for 40% off any regularly-priced item (this coupon is only valid from 1/6/13-1/12/13).
Come back to let us know what you score! :)