Get to the Point

So I was sitting at my computer the other day, and I was staring at my computer screen. Let me make this more clear... I was sitting at my computer and was staring at a blank Microsoft office paper trying to figure out what in the world I was doing.
One of the worst things in the world that I absolutely hate is trying to figure out an outline for writing a paper. I have never been good at it, and I usually don't do it because it makes me all flustered. Your probably thinking I'm stupid or whatever, but trying to begin a paper is so hard for me. I'm a math girl. You get an equation, use the method, and get the write answer. Easy as 1, 2, 3. With writing, there are a billion million zillion different ways to write and a billion million zillion different things to write about. This isn't really that bad though because it gives you a freedom and way to let you write whatever, but it takes me forever to write things because of it. I'm a perfectionist and I want things to be done perfectly and fast, but with writing it's not always like that.
First of all, you need to really understand what you are writing about. Well that is sort of common sense. It's impossible to write a whole paper if you don't even know what you are talking about. It is THE MOST FRUSTRATING THING EVER. Right now I am writing, well trying to write, a paper arguing about the insanity plea and how I think it isn't a valid form of defense. I spent all of yesterday going back and forth on what I am even getting at in my paper. Is it good or bad? Should I write that I think the defense has changed over time? Why am I sitting here freaking out??
Basically, I need to get to the point when I write. I need to really understand what I am saying and I need to make sure my reader doesn't fall asleep half way through the paper.
I really need to get going on it.