Opinions are like...

Well, here's mine, on qualities of a good resume:

  - consistent style
  - no complete sentences (too verbose especially w/ consistency)
  - everything relevant listed
  - good organization, most relevant things first
  - LaTeX or markdown for consistent formatting in your output
  - no typos
  - nice resume paper (a nice touch)

Anything marginally but decidedly helpful that goes past the first page is likely to be ignored, but maybe keep it anyways, especially if you've been in the workforce for more than 10 years. Less than 10 years, probably keep it to one page.