Its interesting that i have seen so many threads on this subject (trying to find ways to sneak a few extra words into their personal statement). Everyone remember, this is supposed to be a professionally written piece of literature. As such, it should contain all of the the traditional spaces, paragraphs, punctuation, etc! 😛. Furthermore, everyone should be thinking quality, not quantity. What you write should be succinct and to the point. Don't try and stretch something that could be said in 1 sentence into 3. If you just can't seem to manage getting everything in on one page, try narrowing your focus or working with someone to proof each draft.
Corollary: You should be going over each successive draft with somebody anyway. It will make your life MUUUCCCCHHHH easier, and your paper MUUUCCCHHH better! It took me like 15-20 drafts before I had my decided on my final copy.
I know I wrote a bit more than this thread was about, but it was the most stressful part of my application. I hope this helps a bit. 👍