Writing every day is NOT enough to improve your writing.

Writing every day does not lead to better writing any more than lifting the same weight every day does not make you stronger. Growing stronger requires a gym schedule, a nutrition plan, and many other things this 139-pound writer is obviously not aware of. — Todd Brison in Advanced Writing Advice for the Modern Creator

Ever since I started searching for writing advice 18 months ago, I kept seeing something like “writing every day will make you a better writer” and my intuition screamed “NO! That can’t be enough!”