Put yourself in their shoes
Many a problem has been caused by someone putting something in writing in a way that led to misunderstanding. What you intended to convey and what is interpreted by the reader can sometimes be very different indeed. For example, what you intended to be friendly advice could be perceived as issuing instructions. These mismatches arise because communication does not take place in a vacuum. When you write something you will be doing so within a context of your own circumstances and your own frameworks of meaning. The person reading what you have written will be doing so within their own context and their own frameworks of meaning, and so there is plenty of scope for misunderstanding. What can be helpful is this: if you are writing a letter or report, imagine you are the intended recipient and have just opened and read it. That is, put yourself in the recipient’s shoes. Are you sure, when you look at it from this perspective, that what you have written will convey what you wanted it to?