[yumiris]

By separating who we are from what we do. Our jobs are our jobs, not us. Our projects are our projects, not us. Our perfectionism exists because we've been taught to define our worth according to how perfect something we create is. As such, separating ourselves from our creations is a step towards overcoming that perfectionism.

There are other things to consider: our attachment to other people's opinions, perceiving failure as a lesson and investment towards our success, knowing that perfect is the enemy of good, and so on. But that will naturally come when we remove our ego from our work and not give it power.