I've also addressed the issue of composting in posts I did on 8/27/09 and 10/21/09. Again, this is one of the easiest ways to help the environment. It used to be a very messy and smelly process years ago. Today, there are pieces of equipment that can be purchased very inexpensively to assist in having a more sanitary composting process. In one of the composting posts, I mentioned Leonardo DiCaprio's commitment to the "go green" movement and how he included living green in as many phases of life that he can. I'm sure that he incorporates the use of a rain barrel as part of his involvement. A 8/6/09 post was on eco-friendly packaging materials. A good percentage of the materials were made from recycled materials.
I remember visiting my grandparents when I was little. They made use of rain barrels decades ago. Part of the reason they saved water was due the hard economic times they grew up in and part was due to the fact that clothes washed in rain water kept them very soft. My grandmother also used the rain water to wash her hair. It always smelled good and was very soft to the touch. Her barrel was very different from the ones that are out today. She had the old wooden barrel with the metal staves. It was very tall and always covered to keep debris out.