Use a short and accurate subject header. Avoid saying too much in the subject header, but make sure it reflects the content of your Email to a person unfamiliar with you. If possible, include a keyword that will make the Email content easier to remember and/or search for in a crowded inbox. For example, “Meeting on March 12th” is specific enough that the email topic won’t be mistaken for anything else but not so specific as to be distracting (ex. “Schedule, Guest List, Lunch Requests, and Meeting Overview for March 12th").