I kind of recoiled in horror at this one. Whenever I'm working on my own resume or helping someone else with theirs, I go by one simple rule: your goal is to get the person reading to the END without going pffft. That's it. If you can get them to the bottom of the page without losing them, you'll be one huge step closer to an interview - if, along the way, you've proven that you're at least minimally competent, you've done everything a resume is meant to do.
One thing I did that caused a notable increase in responses was to put a dotted line down the right side, with horizontal lines at each break (school, work, volunteer) leading out from it. People were more likely to get to the end if they were following a little dotted path. And if someone reads your whole resume, that's a pretty good start.