Doc's a realist and knows that if you really want to go the whole nine yards in implementing green printing practices in your office, you have to be willing to spend a little more. At some point, someone has to pay to recycle old ink and toner cartridges and even outdated printers. In some cases, a printing partner may pick up the tab, or you may have to figure some of those costs into your printing budget.
Here's a good video introduction to how one office equipment supplier is approaching recycling with its customers. The company, Modern Office Methods (cutely known as "mom"), makes it easy for its customers to do the right thing and helps them implement cost effective recycling programs.