For tagging anything that helps us reduce waste, and keep stuff out of landfills.
Don't throw it away, fix it! Or use pieces of it as raw material for building something else!
And whenever possible, just don't buy it to begin with! You might even find what you need in someone else's trash! Or in a dumpster! Or in a free box! And if you can't find what you're looking for, maybe in all the time it takes you to seek it out without buying it, you'll realize you really don't need it that bad, anyways.