On Saturday the 20th of November 2010 only, Rona stores are having a special promotion, offering you a 15% discount on one product of your choice!
The small print has some info that you might be interested in:
Consumers will save 15% on one product of their choice per transaction, per person, per day. Limit of 15 units of the same product (same product code). Discount applies Saturday, November 20, 2010, on all in-stock merchandise available in store only. Special orders, the purchase of RONA gift cards, layaways and services offered in store, such as installation, delivery, rentals, cut shop services, etc., are not eligible for this promotion.
So for example, if you plan on buying something like flooring or tiles, you'd only be able to buy 15 of any 1 item. If you need more than that, I suggest bringing in some family members with you, and each of you could use up your quota of 15 items.
My friend is doing major renos on his house at the minute, so he's going to be very glad of this offer!
And on a final note, there are a few printable coupons for Rona here. They're all for specific products, not for generic discounts. They all end on the 23rd November 2010.