To edit and proofread, I begin by reading the text multiple times. Pay close attention to grammar, punctuation, and spelling in the initial passes. Ensure consistency in style and tone, and address any issues with clarity and coherence. Take breaks between reviews to maintain objectivity, use proofreading tools but don't rely solely on them, and seek feedback from others if available. Lastly, focus on details to ensure a polished, error-free final product.