Forum member exciter1 informs us that Toys R Us USA currently has all LEGO Star Wars sets on sale at 20% off for this weekend. This includes the new 75146 LEGO Star Wars Advent Calendar on sale for $31.99 (reg.$49.99). (thanks also to Sfer07 for writing in with the news)
They also have BOGO 40% off ALL LEGO Minecraft, Speed Champions and Jurassic World sets. Some sets have been reduced already so it makes the BOGO 40% off sale even better. (valid until September 3)
Select LEGO sets are also on sale at 20% off (from August 28 to September 5).