At the end of life, make sure you are disposing of your equipment and materials in a safe, environmentally responsible manner. This may involve disassembly with some of the materials going into the recycling stream and other materials going to landfill or incineration. The goal is to take landfill waste down to as close to zero as possible. Most important, you want to keep toxic materials out of landfill. For instance, remove and safely process all batteries, oil and fuel.
You should consider engaging with a reputable recycler that will collect your equipment and process it in responsibly. This is especially important for electrical and electronic equipment, which may contain lead or other toxic substances.