Thru November 21st, there’s a nice opportunity online at Target.com for a FREE $10 Target Gift Card with LEGO set purchase of $50 or more. This deal is online only as far as I know, and no code is needed, just add the set(s) you are interested in to your cart, and once you hit the threshold the $10 Target Gift Card will automatically be added.
This offer is valid on all types & themes of sets including Duplo, Star Wars, LEGO Friends, LEGO Juniors, Advent Calendars and more, and over 500 toys qualify toward the spending requirement online.