Don’t waste it, recycle it! That is the slogan that I apply in both my work and also at home. Many materials can be recycled instead of just wasted. Thus like cardboard, rubber, carton, paper, textiles and there are a lot more. Recycle can save a lot of money without you even realize. Every time you want to throw something, think about recycle them.
There are people who specialize in buying unused materials like printer cartridges, stainless steel drums and even building materials.