A summer spent hiking in New Mexico and canoeing in Maine was the acme of my scouting experience. For two separate weeks I and a few of my friends traveled with no more than we could carry on our backs in very rugged places far from the rush of civilization. To prepare for these trips we learned to leave behind anything that we would not need. Every ounce mattered. Anything extra would be a distraction and burden for what lies ahead.
Life can also benefit from leaving extra things behind.
Having moved several times, if I have not used something in the most recent 3 to 5 years I am likely to sell or give it to someone more likely to appreciate it. And when considering purchasing a new item, I think for a moment if I will still be using it in 3 to 5 years, if not, should I leave it for someone else to buy.