The CEO of Redfin, Glenn Kelman, has a fantastic guest post on Guy Kawasaki's blog.
Glenn provides an incredible amount of visibility into the costs of a startup, providing side-by-side projected expenses vs actual. In particular, I found his comments on the business side of things (lawyers, accountants) to be great advice. Many entrepreneurs (esp. ones that are R&D oriented) aren't aware of the requirements placed on the company when taking outside investment.
Tags: entreprenuer, Redfin, venture capital