It is good practise to highlight the section headers in bold type and to leave extra spaces between paragraphs. Keep the left and right margin equal. Always use clear unambiguious words. Highly technical words may look impressive but are apt to confuse the reader. Avoid complicated phrases.
Simple phrases are always the best.
Never take things for granted. Explain everything in a clear and concise manner. Never use abbrieviation unless is it absolutely unavoidable. It you have to use them always explain what they stand for . Never sign your CV, it s not required.