Those questions represent the most common reasons why someone would begin to look at their resume and decide if it needs to be updated. What most people discover over time is that their resume should always be update-to-date as job changes can occur suddenly and without any prior warning.
But be certain that you use a top notch copying machine. Otherwise, you'll still end up with poor looking resumes. Another alternative is to have the typesetter produce as many original copies as you need to ensure that they all look good. A third aspect of your resume's appearance is more subjective. It takes into account such things as the letter spacing, how each section is arranged, and it's overall appearance. Some resumes simply look better because of the way they have been designed. At the end of this report, you'll see an example of a properly prepared resume.
Acronyms and credentials after the applicant's name should be spelled out fully in the appropriate section of the resume, greater chance of being found in a computerized keyword scan. Resumes can vary in style and length, but should always contain accurate contact information of the job seeker.
One of the first misconceptions that people hold about the use of resumes is that they are never actually read, especially when there are online application forms to be filled out. While this cannot be proven either way, I do know from my own experience as a professional writer that most recruiters do look at the resumes received because it provides a general overview of the candidate's attention to, or lack thereof, details such as the style and type of writing.