Writing and editing use different mental modes -- drafting focuses on getting ideas down without self-judgment, while editing focuses on clarity, correctness, and cutting what doesn't earn its place -- so separating the two, even by just finishing a draft and reviewing it the next day, tends to produce stronger results than editing while still drafting. A simple self-editing checklist includes reading the piece aloud to catch awkward phrasing, cutting unnecessary words, double-checking subject-verb agreement, and verifying that any facts, numbers, or links are correct. Common mistakes to watch for include run-on sentences, inconsistent verb tense within a piece, overuse of passive voice that makes writing feel vague, and confusing 'its' (possessive) with 'it's' (contraction of 'it is').