My general rule for feeling mentally well is understanding that the more I judge others negatively, the more I anticipate negative judgement from others. Practicing kindness and leniency and forgiveness has no guarantee of reciprocation, but it puts you in a better state of mind.
Printers never work because they are an affront to God. Man was not meant to pull objects from the digital realm into the real world. Icarus is flying too close to the sun.