To go along with the first tip, make sure you get as many free boxes and packing materials to use as possible.
Check places like Craigslist.org or Freecycle.org, your local classified ads, your friends, neighbors, local recycling center, shopping market, schools, businesses, membership grocery stores and other organizations, and ask if they have any extra boxes you can take.
In addition, the U.S. Post Office has a special price for shipping books and magazines, and you can use Media Mail to cheaply ship these items. Then, use as many of your own towels, bedding and clothing to ship these items.
Only after you have exhausted all of your free resources should you consider purchasing packing materials, but with a little time and effort, you should be able to find all of the free packing resources you need.
(Image via Flickr)