To be effective, you have to determine which tasks must have no errors (e.g., tax documents) and which can be “good enough.” Perfectionism impairs that judgment and kills productivity. If you’re a perfectionist, you have to learn to tolerate “good enough” when appropriate.
Practice it by allowing spelling mistakes in your to-do lists, letting your paper files get a little messy-looking, or putting away a decorative object in the wrong place. It’s a spiritual exercise that will help you make better judgments about how to spend your time. (It strengthens your Drive link.)