Ensure your CV is up to date, well organized, logical and easily understood.
Include everything relevant but keep it brief. No more than 3 sides.
If you are applying for a specific role tailor your CV so that the skills you describe match the requirements closely.
Highlight your job related achievements, if relevant, before briefly outlining your principal job accountabilities.
Take some time to think about your accomplishments e.g. volunteer activities, special projects or assignments, travel and team activities and identify the personal qualities that they brought out in you.