Your CV should be no more than two pages long. Think quality, not quantity. Use an effective summary on the first page and include a list of your key skills and key applications in bold. You want to make an impact on the reader.
Employers often make up their mind from reading the initial summary and key skills.
So, in the 'position sought' section, always tailor the role to the one on offer. Put the greatest emphasis on your last few roles, and summarise older roles. Always begin with your most recent position - include dates and months of employment for each. Several of our agency contacts have sent contractors to interview on the basis of their claimed fluency in 'Dutch' for example, only to be rejected. So, if you only have 'O-Level French', then you have 'basic French'.