We can reserve or conserve our resources by using the resource efficiently or using just the only amount that we needed.
Example, when we brush our teeth, make sure that the faucet is closed if not used so that we can save more water.
Turn off the lights when not using or when not needed.
Walk instead of riding in an electronic or powered vehicles if you can, or if you are not in a rush. This will save you some money and will also help you in health.