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.)
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.