Check out the "100 Ways to Save The Environment" posted on (SEQL) Sustainable Environment for Quality of Life.
If you like to share the suggestions given there, email its link to your friends. You can also print link to a .pdf copy for your file or for friends who are not able to access it on the web.
If you are going to print copy, start collecting A4 size promotional flyers or discarded paper that are printed on one side only.
Why bother? Here's why.