Don't have the feeling of dread when you write your personal statement!
Structure it the way you want, but make sure it says exactly what you want it to say. Write from your heart; not from your mind...I wrote one for pharmacy school not too long ago...and really, the main things I addressed were a short description of where I'm coming from (volunteering, investigation of the field, my perception), why I wanted to go into a particular school of training (so here it would be "why medicine?" - 1 paragraph should do it), and what I can bring (personally - exclusively and inclusively)...It's very easy to write. Just make it unique...sit down a few hours every day (for a week) making lists & outlines...then write the 1 pager!
Finally, enjoy this part of the application. It's hard to write about yourself. Sometimes, what I do, is pull out a voice recorder & talk instead of write...Then, I rewind & transcribe everything on paper or computer. I guess if you really hate writing, you should try this! Best way to get your words down on paper, in my opinion. And honest to God, I'm not a gifted writer: All I need is confidence & ideas when I write...most Adcoms are not english majors, so I'm sure they're willing to overlook some things (I'm sure they'll let a "&" or hypen slide...don't panic if it isn't the most perfect paper. Like I said, make it say what you want it to say, and you're A-Ok!)
Good luck.