That is a great question and it is one which can be easily answered on a basic level and more complexly answered when it comes to how it must come to function in our global community. Simply put being sustainable is making the world around you able to continue to be the way it is as you pass through it. We should want to leave as small an impact on the place we are as we can. To do this many things must be taken into account. Simple things like recycling, reusing, using things fully and making our living spaces efficient can make a great impact but a grand scale must be created if we are reverse the effects that have reared their heads. One simple way to become more in sustainable in your day to day life is to only buy what you can afford. Over consumption has led, in great portion, to our current environmental and financial disasters. It will take time but if we all learn to live a little more simply the system will evolve and constant growth will not be necessary to maintain it. And lets face it the credit card companies are doing nothing to make the current situation any easier. As money gets tighter for everyone they are raising peoples interest rates and making it harder for people to pay off their debts. There is nothing sustainable about credit in this fashion lets all come together and force them to act responsibly.

Cut up your cards. Pay with cash.