Support your favorite blog(s). Do your Amazon holiday shopping through any link from this blog or another favorite site. Amazon Associates like Dynamist.com get a percentage of whatever you spend, and you don't pay a penny more. (The percentage is higher if you order the specific item the link goes to, but Amazon pays a commission on anything you buy when you begin at an Associates link.)
During the rest of the year, I use Amazon mostly for books, but come holiday gift-giving, it's a great source for toys (especially if you don't have kids and need the reviews) and other non-media gifts. For his birthday, I got my father this GPS unit for tramping around the mountains.
UPDATE: Marginal Revolution, one of my favorite blogs, is making a similar pitch.