I keep my resume to one page. When I add something, there is usually something that I consider to be old enough or something that is irrelevant enough that I can remove it to keep space. Although that is getting harder as I get more involved in relevant activities. I'm three years out of undergrad so I'm kinda trimming out the extracurriculars that aren't relevant or I didn't play much of a leadership role in.
And for my personal statement, at least when I was doing my application, they wanted "approximately" 650 words, which is about a page single spaced 11.5 font. So I kept it to that. I just didn't want to have to explain what I was talking about in my essay, when it was already explained in my resume. Looking over it, I talked about 2 jobs, one volunteer experience, and a relevant course that I took, plus future goals and how the program I was applying to fit into those goals.