It is not easy to write clearly and simply, but it is important to try. Users are more likely to understand your writing if you take the time to organize your thoughts and write them in the clearest, simplest form possible, taking into account your audience. To maximize understandability for people with cognitive disabilities, limit the text, add appropriate illustrations, and avoid indirect or implied meanings (such as sarcasm or parody). In the end, nearly everyone benefits from clarity and simplicity.(WeBAIM)


BELOW ARE LINKS TO ARTICLES THAT COULD HELP YOU WITH YOUR WRITING

IS IT POSSIBLE TO WRITE CLEARLY & SIMPLY?   
http://webaim.org/techniques/writing/#possible

GENERAL GUIDELINES
http://webaim.org/techniques/writing/#guidelines

Additional Considerations for Users with Reading Disorders and Cognitive Disabilities
http://webaim.org/techniques/writing/#cog

How Can Writers Know if They Have Achieved Clarity and Simplicity?
http://webaim.org/techniques/writing/#how