Statement of Porpoise

I'm trying to work on my Statement of Purpose/Letter of Intent/Personal Statement (whatever you would like to call it. I feel a little stalled. Do I really know why I want to get a graduate degree? Do I have the qualifications? I think so. So how do I communicate that?

I'm worried about getting too wrapped up in other people's ideas before I try to sort it out for myself. Last night I just sat and wrote and tried to put down whatever came to me. I don't know if I should just go from what came last night or try a second time from a different angle and see what comes.

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I just tried writing some ideas and nothing substantial would come. I'm probably tired. I've done quite a bit since Monday. I should probably just get some good rest.