Consumerism is not limited to goods market alone. The clutches of consumerism is getting equally strong in service market as well. In most cases, people buy services that they themselves can do if a little more commonsense, effort and discipline is brought into life. Rather than needs consumerism in both these sectors are, most often, chiefly propelled by the lack of above qualities in life. Therefore, for a calm and pleasant life, you have to ensure that you are not besieged by foolishness, vanity and indiscipline in life. You should also ensure that you are not a victim of market forces and you buy things based on prudent decisions of yours.
Practice it and make it a habit. Then the nature will make it sustainable by triggering necessary genetic engineering!