Keep every email as short as you can; it saves you time and, more importantly, respects the recipient's time.

　　電郵要盡可能簡短。既可以幫你省時間，更重要的是，也尊重了收信人的時間。

　　The faster you respond, the shorter your response is allowed to be.

　　回復越快，內容應越簡短。

　　Always include one line of context if the recipient isn't expecting this email.

　　若收信人事先不知你要發這封郵件，記得先加一句介紹。不管你與收信人首次聯絡還是經常共事，這一點都十分重要。

　　Put your "ask" or "action items" first in the email, not last, and make them explicit. It should be immediately clear to the recipient what you want.

　　把“問題”和“任務項”明確地寫在開頭，而不是最后。這樣一來收信人一下子就能明白你的訴求。

　　If there is a deadline, say so. If the request is not urgent, say so.

　　若有截止期限，請說明;若要求并不緊急，也請說明。

　　If you don't need a response and an email is FYI only, say so.