Keep sentences simple and concise. There is no need to use big words.

Avoid repeating descriptive (adjectives) or action (nouns) words.

Avoid repeating in the discussion segment, details from the introduction and results.

Spend some time to organise your facts before you start writing.

Avoid ambiguity when describing methods, background and conclusions.

Check your data to ensure that it is accurate and properly analysed (if applicable).