You can reduce the amount of paper used when printing your LaTeX files in a couple ways. First, you can use a two sided printer---most of the HP printers in the department will print on both sides of the paper by default.
Second, you can reduce the size of the pages you print and fit multiple logical pages on a single physical sheet of paper. In order to do this, you will first need to translate the DVI file to Postscript Then you can use the psnup(1) utility to modify the Postscript file so that two or even four full size pages are reduced to fit on one side of a sheet of paper. To create
Most any document can be reduced for 2-up printing and still remain completely legible. Reducing documents with text smaller than twelve point for 4-up printing may result in letters that are too small to read comfortably. You may need to experiment a few times before you get a feel for what works for you.