Optimize Images: Compress images using tools like TinyPNG or JPEGoptim. Use appropriate formats like JPEG for photos and PNG for graphics. Use CSS for Styling: Instead of embedding styles directly in the HTML, use external CSS. This can significantly reduce the file size. Minimize HTML: Remove unnecessary spaces, comments, and code. Tools like HTMLMinifier can help. Limit Attachments: Instead of attaching files, use hyperlinks to direct recipients to your website or cloud storage.