All written material, such as an application , in the job search process are selling tools that outline/show your skills and experiences so an employer can see, at a glance, how you can contribute to the employer's workplace.

As with all marketing materials they have to sell you in short order. While you may have all the requirements for a particular position, your application will not get a passing grade if the employer does not instantly come to the conclusion that you "have what it takes" - this may take less than thirty seconds.

Begin writing your accomplishments (Situation or Task, Action taken and Results) both large and small, as many as you can think of, position by position, year by year. Don't worry about length at this point; the less relevant points will be edited out later.  Talk to former co-workers, family and friends, they may remember achievements you may have forgotten.

Situation Or Task
Describe the situation that you were in or the task that you needed to accomplish and put this into context. You should use a specific example; try not to be too vague or generalised. The situation or task can be taken from any part of your life, for example, work/volunteer experience, study, personal interests or hobbies. Ensure that you give enough detail so that the employer fully understands.

Action
Logically create a picture for the reader to walk them through the steps you took to handle the situation or resolve the problem. Keep your statements clear and concise and focus on what you did, not what you might do.

Result
Explain the results of your actions. What did you achieve? How did the situation end? What did you learn from the experience? Even negative aspects and situations where things went wrong can be discussed positively as learning experiences.