One of the cool things about the TOK essay is that you have prompts from which to choose. I got to pick a direction that really interested me, and explore both the topic and how I related to it. Editing will always make an essay better, so don't be afraid to write as much as you want the first time through, cutting might seem difficult at first, but if you don't restrain yourself you'll have some awesome thoughts that you may come across while writing.