It is a mistake to think of your resume as a history of your past, as a personal statement or as some sort of self expression.
If you write with that goal, your final product will be very different than if you write to inform or catalog your job history.
Most people write a resume because everyone knows that you have to have one to get a job.
They write their resume grudgingly, to fulfill this obligation. Writing the resume is only slightly above filling out income tax forms in the hierarchy of worldly delights.
If you realize that a great resume can be your ticket to getting exactly the job you want, you may be able to muster some genuine enthusiasm for creating a real masterpiece, rather than the feeble products most people turn out.
So, even if you face fierce competition, with a well written resume you should be invited to interview more often than many people more qualified than you.