A Fixer is someone who gets things done. It's easy to critique or complain but a Fixer looks for ways to make things better. They help identify issues and then actively seek solutions. They won't let jealousy or insecurity limit their approach to a problem because they know great ideas can come from anyone - their boss, an intern or the jerk in the neighboring cubicle.
A Fixer see gaps and they fill them. They anticipate what needs to get done and if they finish their work early they'll help their teammates even if it means doing something that's outside of their job description. They know the better the group looks the better the individuals look within that group.
You don't need to be an emotionless robot but don't let your reactions get in the way of progress. If you're stressed or upset, acknowledge it then move on. We all have stress and you don't want to get caught in the tit-for-tat trap of measuring your woe's against everyone around you. Focus on getting things done.
When something goes wrong what's your default reaction? Do you complain? Do you attack? How long does it take you to process stress and start looking for solutions? Manager's dream that every employee will be a Fixer. Entrepreneurs need to be Fixers by necessity. Be the person others can depend on for solutions.
Huge thanks to my friend Paul Dinletir for introducing me to this term.