Ask other people to read at least part of the document. It is a good idea to ask different people – for example:

• an expert in the field you are writing about
• someone who has a similar background to your target audience
• someone who has a good eye for grammar and style.

For example, for a scientific paper, the author should show it to:

• the person on the next bench (ie someone with experience in the same scientific field – to check accuracy)
• the person down the hall (ie someone with a science background but in another field)
• their friend (ie someone with a good eye for grammar and style).