Sustainability on a homestead can be achieved through practices such as composting, water harvesting, using renewable energy, and practicing permaculture. Composting turns your kitchen and garden waste into rich soil for your garden. Water harvesting, such as collecting rainwater, can provide water for your garden and livestock. Installing solar panels or wind turbines can provide renewable energy for your home. Permaculture involves designing your garden or farm to mimic natural ecosystems, leading to a sustainable and self-maintaining system.