Remember, there is nothing unusual about having two or three resumes on hand targeted for different types of jobs. Carefully proofread and edit your resume. Take the time to read your resume at least twice and read it aloud to help catch awkward phrasing. Reading it over and over makes you more prone to skim over sections and overlook mistakes. Make the effort and investment to produce a quality finished product.
Most chains offer computer and printer rentals for minimal cost.
It's a small investment when you consider the long-term return. Keep your resume up to date. It's rare that anyone has lifetime contentment and security in a job. Always be prepared. Especially as you get promotions and new responsibilities, you should note these in your resume, purging outdated material.