Spelling and grammar
Make the most of the spelling and grammar tool on your computer and ask a friend or relative to proof read your CV. This may sound somewhat basic or over the top but it is crucial to the success of your application. Many employers will reject a CV immediately if it has errors in it and even if they do not, it will make an impression on them (which will not be positive).
Formatting
Make sure your CV is well presented, but not over elaborate. It should be set out in a logical order, and be clear and easy to read so that your strengths are easily recognisable. Do not be tempted to play games or add gimmicks. There are very few circumstances where unusual paper, fancy folders, coloured ink will be advantageous - so unless you and the job you are applying for is one, steer clear.
Detail
Keep your CV as concise as possible, but make sure that you provide enough details to make the relevance of your skills and experience evident. For example, explain what the job or project accountabilities included and give some dimensions to the companies you list (size, scope, sector etc - the precise details you should include will depend on the company and the job you did and are applying for)
Relevance
No matter how relevant your skills and qualifications may be to the position you are applying for, make sure that you are explicit about this and link them to your experience. Never list skills, qualifications and experience out of context. Consider the use of a cover letter to increase your ability to highlight achievements and experience and demonstrate their relevance.
Timing When applying for a specific position, it is important to meet the application deadlines specified and to have a final read over everything before you sent it off.