Go green, buy black (toner)...
I just refilled the toner in my laser printer cartridge using a kit and a bottle of toner. It couldn't have been easier or cheaper. And, I have the satisfaction of getting just a little bit more out of that big chunk of plastic. I ordered the kit and toner from Toner refill kits and I was impressed. More toner than would fit, fast delivery and simple directions (on a CD...well, not entirely eco friendly, but better). I can probably use the same cartridge 3 times before I need another.

