Start the business letter by clearly stating the purpose. Unlike other types of writing, business writing uses clear, concise language and gets right to the point.
Allow sufficient context clues when using idioms in the body of your business letter -- just in case someone reading the letter does not understand the idiom. An idiom is a phrase that has a meaning that contradicts the literal meaning of the words. For example, the idiom "across the board" is not referring to something going across a literal board. It refers to something that is all-inclusive. To use this idiom, say something like, "We're making changes to our infrastructure across the board." To add context clues to make this clearer, add to the letter. For instance, the sentence following the idiom could state, "No department will be immune to the changes."
Explain jargon that you use in the business letter that not everyone reading the letter might understand. Jargon includes words that have a specific meaning to a group of people. For example, only certain professionals might understand technical jargon. If jargon is necessary to your business letter, explain any terms or phrases used, like "synergy," which is when workers within a business combine their outcomes for a complete goal.
Cut out unnecessary jargon. Review the business letter to see if there is jargon you can cut like "full service," which has no meaning without a list of all the specific services. Jargon can also refer to long, wordy phrases that have a specific meaning but could be replaced by something more comprehensive or simply eliminated all together. For instance, "utilize" can be replaced with "use."