Write your own blog. I know it's an unnatural experience for those of us who would rather have our heads down coding, but it's worth it for several reasons:

1. You blog should speak with your own voice. Nobody can replicate your passion for what you're doing.

2. Nothing will help you refine your message more than trying (and initially failing) to communicate it.

3. Like it or not, your startup's success probably depends more on your ability to communicate than on your ability to code (you can already code, or you wouldn't be here). Doesn't mean you have to be awesome at it, but you do have to be good enough to get people to listen to what you're trying to say.

4. When, after lots of practice you do get good at it you'll actually start to enjoy sharing your thoughts with the world.

Good Luck-

- Ben