Haha, I thought I was the only one. I have a spreadsheet as well that I obsessively check/update. I'm only applying to six schools but I still think I could easily forget something if I didn't have an elaborate system in place.
^I second that. After much procrastination, I finally dived in and wrote the first draft of my personal statement yesterday (and that's only because I forced myself to set up an appointment at my school's career center to have someone read it).
If you have trouble starting, I'd recommend the same approach. Maybe establishing a deadline like that will push you towards writing it.