This week from August 19-25, Toys R Us Canada will be offering 20% off select LEGO Minecraft building sets. Spend $50 or more on ANY LEGO Building sets and you can receive a $10 LEGO Savings Card. Savings Card can be used towards your next purchase of $10 or more on LEGO (from September 2-29).
LEGO Super Heroes sets also appear to be on sale at 20% off at Toysrus.ca as well. Thanks to forum member legohunter for the news.