Do you shop online? If so, where?

[CJK]

As we plan for our next WDW trip, I've joined some online reward programs to try to make some extra spending money for the trip. With many of these programs, they provide many, many opportunities to shop online for extra points. As a Canadian, we're not eligible for many of these offers (or the exchange rate makes it not worthwile for us). I was wondering if any of you shop online? If so, where? Have you had good experiences? TIA!