It is sometimes tempting to correct spelling or grammar but it is less confusing to just let the error go. Use a spelling checker. Wea awl ocationaly slup adn mispell sumpthing. The computer should help us avoid sending our mistakes out to others. The mistakes will still happen but we should be able to cut down the number.
Many people fall into the trap of going overboard in keeping E-mail short.
One exception to this tip would be when responding to specific questions or comments. Split up the text of your E-mail message into small paragraphs that address one topic. This makes it much easier for the recipient to respond to a specific part of your message. Don't assume that everyone is using the same E-mail reader that you use. A better way to send special characters is to include the message in an attachment.