This page contains some interesting advice I didn't know, useful for traveling in general. Traveling without a luggage is a staple of mine, but I am not at this pro level yet.
For other commenters, overcoming materialism means not being attached to objects. Not necessarily living on a backpack. The idea is to have objects if you can, but don't suffer for their loss, or their gain. Seneca, the stoic thinker, might be a great read to start.