Most all of us go through ink cartridges. I hated throwing mine out and polluting the landfill. I've found a great way to recycle HP and Lexmark ink cartridges while generating $$$$ for Operation Gratitude. Operation Gratitude receives $2.00 for every cartridge you send to Recycle For America. Operation Gratitude turns that into care packages for the troops.
It is easy! Save your cartridges, collect them at work, from friends and neighbors, then box them up and send with the postage paid label you can print out. It doesn't cost anything. All supplies to set up collection sites are also free. All instructions are at the Recycle For America site.