Yes, it's that time of year again: U.S. Thanksgiving is Thursday, November 22, which means that Black Friday--the biggest sales day in the U.S.--is coming up on Friday, November 23. (The Black Friday sales will start early on Nov. 23 and extend throughout the weekend.)
If you're not familiar with Black Friday (i.e., you're a newcomer to Vancouver or any Canadian city near the U.S. border), it's basically Boxing Day on steroids: all major chain stores in the U.S. will have special Black Friday sales on everything from home furnishings and electronics to fashion and toys. The sales start (very) early on Friday, so if you can afford to stay the night, your best bet is to head down on Thursday.
Remember, too, that duty-free limits have risen since last year: Not counting alcohol or tobacco, the new duty-free limits allow each person to bring back $200 worth of duty-free goods (increased from $50) for a 24-hour trip, $800 worth of duty-free goods (increased from $400) for a 48-hour trip, and $800 worth of duty-free goods (increased from $750) if you're gone 7 or more days.
There has been some controversy about over-the-border shopping--back in August, some Bellingham residents expressed annoyance at British Columbians raiding their Costco--so remember to be polite while you're grabbing your (discounted) goods.
Here's everything you need for Shopping in Washington on Black Friday: