I just discovered a way to conserve ink in my printer. I use an HP officejet all-in-one which is the best printer I have ever owned. It is a true workhorse. I stumbled upon a new setting that I had noticed under print presets: Plain paper, fast draft , black and white which I now use as my default setting. Not only does it convert everything into black and white, it spits out my print jobs so quickly, they fly out of the feeder and I have to catch them on the way out! This setting will save me a boatload of time and ink and reduce my impact on the environment.
I also use a 3 tray paper cabinet under my printer so that I can recycle old printed paper to reuse later. The top tray has new paper, middle specialty paper and the bottom recycled.