Every day, multiple people post listings for free moving boxes on craigslist it’s a really good way to save some time and money moving.  Much better than the former solution, which was to go to the liquor store and take what they were willing to get rid of — those were all annoying tiny boxes.  Craigslist even lets you create an RSS feed for a search term, so you can be updated quickly and be the first one to respond to a free moving box post.
Of course, now that I have the boxes means that I have to pack them.  Crap.