To make off-grid living more sustainable and environmentally friendly, individuals should incorporate eco-friendly practices and self-sufficiency techniques into their lifestyle. This includes utilizing renewable power sources such as solar, wind, and hydro, conserving energy, and implementing waste treatment systems like composting and incinerator toilets. It is also important to produce at least some of your own food using sustainable farming methods and to use heating options that rely on biomass or electric sources. Additionally, investing in supplies like a hand-crank washing machine can reduce solar power needs and minimize environmental impact. Keeping these factors in mind and continuously seeking out new sustainable practices can lead to a more environmentally conscious and self-sufficient lifestyle.