Does Outlineing Really Work?

I don't know if you could call what I'm doing a really outline, but let me tell you, it is working. I'd like to share with you what I'm doing and how it's working.

First of all, as I've mentioned before, I wrote Bum's Rush by the seat of my pants. It took me more than four years to finish, but it's done and it's good. Then I got this idea from another writer, about a high school prom queen and how she betrayed her best friend from second grade. It all takes place five years after they graduat...