Learning for sustainable development

What actions could you (in theory)undertake that would improve the sustainability of your lifestyle.What might be preventing you from doing these?

"Brundtland definition"of the 1987 report of the world commission on environment and development that sustainability means "meeting the needs of present without compromising the ability of future generations to meet their own needs.Sustainability is the re-use of things.
To improve sustainability in my lifestyle i would install a low flow shower head because at the moment i only have a bath.A lot of water is being wasted which in turn is not good for the environment.I would promote efficient practises eg telling all the people in the household to take short showers,and not letting water run when brushing teeth or shaving.
I would also try to reduce air pollution because it has a big effect on our health and the environment.In order to pollute less and save money i would turn off the appliances and lights when i leave the room.I would encourage my family to wrap themselves with blankets during winter instead of using central heating.I would also educate my family on the importance of reducing how much we use because most of the time a lot of food is being wasted because people cook or buy more than they need.I would also re-cycle paper,newspaper,mail,glass,bottle etc.To avoid gas emmission i would reduce the amount of gabbage to landfills by composting food scraps,grass and dead plants.
There are ouite a number of things that might prevent me from doing some of the things as i might fail to use water sense gadgets or repair leaks because of lack of money.On saving energy it might be impossible to save because i am not the only one living in the house children might leave the appliances on or watch televission till late which in turn consumes a lot of energy.Time may also be a limiting factor sometimes i am too busy that i cant even cook food so i end up buying pre-cooked food meals and end up having products with more packaging than i need.