More than a tweet, less than a blog.

factoryjoe:

1. Pick good cofounders.
2. Launch fast.
3. Let your idea evolve.
4. Understand your users.
5. Better to make a few users love you than a lot ambivalent.
6. Offer surprisingly good customer service.
7. You make what you measure.
8. Spend little.
9. Get ramen profitable.
10. Avoid distractions.
11. Don’t get demoralized.
12. Don’t give up.
13. Deals fall through.

From Paul Graham

From personal experience I know that you Ignore these rules at your own peril.