Most people finish using an ink or toner cartridge and immediately toss it in the trash. But that’s the worst thing you can do. Used cartridges still have value, and many recycling programs will pay you for them. Instead of letting them pile up in a drawer or ending up in a landfill, collect them and send them to a recycling service. It’s a simple way to declutter your office, help the environment, and earn a little extra cash. Sometimes, the smallest office habits can turn into an easy way to make money.