[hectormalot]

Can't agree more on the one page part. Depending on the background / culture of candidates I've had resumes up to 12 pages long.

A bit of formatting also helps, a professional looking resume will frame your accomplishments better. Something many readers are sensitive for.

And show impact. "Developed key metrics for project hazel" reads different than: "rewrote metrics engine resulting in real time view on all client transactions, leading to $10M in new marketing opportunities".

And finally, if you're really interested in a job. Adapt your CV to show the most relevant information for that job first (and word it in the best possible way, e.g. look for the language the employer uses to describe the job)