Peeves make terrible pets. They make too many messes and cost too much to feed.
Stop beating yourself up over missed opportunities and mistakes. Several people are already lined up for the job, which means you are free to focus on more important and appropriate work.
You’re already not using much of the brain potential you possess on an ordinary day. Being pessimistic and negative instead of faithful and hopeful robs you of even more mental strength. You don’t look around long or hard for an item (or an awesome outcome) that you are convinced doesn’t exist.