Phone Calls--Make phone calls instead of driving whenever you can. An example would be calling beforehand for store hours instead of driving to the store only to find out they are closed. If you conserve mileage, you preserve the life of your car. This actually makes sense even for healthy cars.
Determine Your Need: Every spare part is made for a specific make and model of a BMW, Mercedes, Toyota, etc. It may not be compatible with another make or model. Therefore, wherever you will be buying your buy used auto parts, be specific with your order. Let the dealer know that you need x part for y vehicle of make a and model m. Failure to do this may cause you to regret later on. Once you have defined what you need, we move onto the net stage.
Believe it or not there are a lot of motor home junkyards in the United States and they make great places to get parts. Some recreational vehicle junkyards have motor homes that are over 30 years old and that means you can find nearly any part you need. The junkyards are well known to those RV repair shops, which will use them to get parts when they cannot find a part in the catalog they need to repair someone's motor home or recreational vehicle.
Some can be literally acres wide and long, some are simply a lot. It greatly depends on the area that they are located as to how big them can become they are closely regulated by several government agencies because of the potential for pollutants to harm the environment.
Now that you know exactly what you need and you have information on some of the places that you can find it, take some time to call up or visit nearby places that may be selling the parts you need. Ask about the lowest prices they can give. Perhaps the best way to find cheap motorcycle parts is to go to salvage yards where they even give some parts for free or at dirt-cheap prices. Just make sure that what you're getting from salvage yards are still usable.
Wood is a renewable source, however you need to be careful what type of wood you choose. Hard wood tress such as oak take a very long time to grow and do not grow again once they have been cut down. This makes these types of wood inappropriate to use because it is unsustainable. Pine on the other hand is fast growing and makes a good, durable wood. pull a part lakewood is very much sustainable. Another type of wood that is catching on around the world is that from bamboo. This doesn't' take very long to grow and keeps growing even once cut down. One plant can keep on producing wood for decades. Because there is just a couple of years needed for bamboo to grow to a good size it offers total sustainability. Bamboo flooring is extremely durable and hard wearing too and requires little maintenance.