Do you feel your writing can always be improved, or are you tempted to say, "Enough is enough!" If you believe in revision, share one thought or experience that might help someone else. If you don't, share that, too.
Repetition is the best form of emphasis and consistent practice leads to improvement and not perfection because no human being is perfect.
Personally, my writing can be improved if I don't stop writing. Writing in English more and more improves my writing skill and widens my knowledge base. Saying 'Enough is enough!' will only lead to stagnation and limitations.
During my formative years in High School, I was trained by my tutor to plan my study and revise everyday before exams instead of cramming. Revision refreshed my mind on the subject I was reading and helped me to have deeper insight on the topics.
To succeed in exams, revision is the best technique.