Writing a CV is very easy. You just need to choose the right format and be to the point and brief. You should start by stating your objectives. Then write your professional experience from the latest to the oldest. Then write your professional qualification, inclusive of any certificates or trainings you have done, Then write your achievement. Your proficiency in various computer modules. Also write your various skills like presentations, communication skills, negotiations etc. Here is a link for a sample CV:
www.quintcareers.com