I think it's alright with messing with the margins and the formatting to make it fit into one page of whatever-type-of-page-it-can-be.
My English teacher once told us to write one-page essays. Sometimes, she said we can mess with the formatting, and other times, she just said "one-page" and that was it. Some of my essays were exactly one-page, and some were like two one-pages put together with 9 pt font and less-than-single-spaced-formatting.
^ harvard44, I think, on a personal note, I like having no extra spaces inbetween paragraphs. Always indent your paragraphs
