I'm a proponent of clear and simple business writing. The Plain English Campaign has developed a helpful guide to make your writing more easily undersood:
Almost anything - from leaflets and letters to legal documents - can be written in plain English without being patronising or over-simple.
- Keep your sentences short
- Prefer active verbs
- Use 'you' and 'we'
- Choose words appropriate for the reader
- Don't be afraid to give instructions
- Avoid nominalisations
- Use positive language
- Use lists where appropriate