The one page limit only applies when you're new in the workforce. I can count on my hands the number of one page resumes when I posted my last position, and I received slightly over four hundred resumes in total.
Some important things:
- Appearance, categorization, and ease of reading. If it looks like a mess, a hiring manager or recruiter is not going to want to spend time on it. I sort mine into categories (about me, my skills, my experience, my education/certifications)
- Don't BS on it. If you do and it's found out in an initial interview, you're going to be put into the "No" pile.
- When stating what you've done, show a positive outcome. For example, don't say this: "Led the PC maintenance project." Say this: "Led a PC maintenance project, saving the company $10,000 a year in costs." In other words, take ownership, and show how it helped the company.
- Use bullet points and list significant accomplishments, especially anything that relates to the desired position. Don't list every minute task though, as it becomes verbose.
- Start off with a personalized paragraphy, describing yourself, work ethic, and goals.
There are more things to consider, and you'll probably fine tune your resume numerous times until it looks right and delivers the impact that's needed for the call-back or interview.
Good luck!