Reuse
Reuse is a process that plenty of of us already put in to practice in our daily lives without realizing it. Each time you buy or sell a new product, for example, Craigslist, eBay or goodwill, is providing an additional use of this product, though not simultaneously, requiring another being created.
Reuse is basically the act of finding a second (or third, or tenth or hundredth) the use of a tool to prolong his life. Reuse is an important step after it's already been reduced, but before you are ready to recycle.
The important thing to consider when you need to use is that "creativity is king" in the process. Creativity also offers the opportunity to be thrifty, by reusing what you already have again for innovation.