When I go out and do mindless shopping (as opposed to purposeful shopping) -- usually when I am in the mind-like-water state (doesn't happen very often, but when it does, I do) and I simply see a product I like (like at the mall or Home Depot, etc.) I take a picture of it and all the info in the price tag with my Palm's built-in camera. It easier than writing it down or trying to remember.
When I see a similar product again, I just compare the characteristics to the photo and I can see which deal is better. Does anyone else do that?