问题：
Here are some basic principles you should follow w
答案：
Plan your message carefully so that you have a clear idea of what you want to say or what you want to ask for.Write clearly and concisely, but be careful that courtesy of tone and exactness of meaning are not sacrificed for brevity.Write simply and directly and with the right amount of emphasis to enable the reader to grasp the contents instantly.Check the letter carefully to ensure that there are no spelling, grammar or punctuation errors.