For example, if an office starts using reverse side of the printed paper for rough drafts, then it can save huge amount of paper. If a person would not waste food and eat only what is needed then you can guess how much food can be saved in your neighborhood.
And if you consider this for the whole country, or for that matter the whole world, we can save a lot and even provide food to the so many hungry and poor people around us.
Use of public transport by a person vis-a-vis a personal vehicle would save the fuel and cause less pollution.
Thus willingness of the people to change their perceptions of the socioeconomic and environmental conditions around them and the readiness of each individual to alter his or her present use of natural resources would be of immense help in the sustainable use of natural resources.