Make sure your language suits the nature of the relationship. 

Did you know that ‘kindly’ is not a very polite word to use in your correspondence?

Many executives have used the word ‘Revert’ to mean ‘Reply’ in their correspondences. But this is a mistake.

The definitions of some terms vary across societies. Take “Rain check”, for instance.

Use an appropriate subject heading in your letters and emails. Do this so that the recipient of the mail knows exactly what it is that you want to communicate.