We should be ready to put a tax on american services in canada. all US headquartered retail stores should have an extra tax. make up a reason and hold it over their heads. they never consider the services we consume when they look at the "goods" trade. Use the tax collected to lower ours, making us more competitive. i would not tax US tech as this would have a determent to our competitiveness. 

In the meantime it easy to stop shopping at US headquartered business.

Retail: walmart,  lowes, nordstomes,  sears, home depot, Amazon, itunes, etc. 
Restaurant:  macdonalds, domino's, (the food sucks so this is easy)
Hotels: holiday inn, howard johnson, hilton, hyatt, marriott, the trump dump hotel etc. 
Gas stations. sunoco, esso. 
Grocery: whole foods
Clothing: gap, nike

Use interact rather then visa/mc. 

Can/Eur stores are all available to replace above  
Don't vacation in US. 

You have to fight them and not roll over.