Free Physical LEGO Catalogues and Magazines
As I checked for the cheapest price on LEGO Sonic I remembered looking at the bottom of LEGO's website if they had links to order free catalogs and whatnot, and they do.
Here are the links for both:
It's always been free that I can remember but since kids and adults love LEGO, serves as a good freebie reminder.
EDIT: LEGO Catalogs' link fixed.