There's a great article on LifeHacker about "Smart and Easy Ways to Reduce Printing Costs." The focus of the piece is on ways to save money, and majority of the suggestions are about ways to reduce print output and ink usage...which just also happens to be good for Mother Earth.
Ok, I just re-read that and it sounded far too hippy-ish...but I'm too exhausted to re-write it. Bottom line: less paper used = less money spent = better for both your wallet and the planet. Suggestions in the article include:
-Print more than one page per sheet
-Use "print preview" and "shrink to fit"
-Only print the selection you need
-Use "draft mode" as the default setting
-Print to PDF instead of paper
There article has a number of illustrations and software recommendations to assist users in accomplishing their suggestions, and the comments section has a wealth of practical tips as readers weigh in with their own experiences. Definitely worth the read!