Bootstrapping (Bottom Up Approach)

I really liked this article. I've read some things by this author who also has his own venture fund. Lately though in the last few years he has been writting alot hoping to inspire/lead a new generation. I believe the top down approach he states is good for financial estimates. It might be good from then to look at the bottom up when building your timeline and milestones. The article is here http://blog.guykawasaki.com/2006/01/the_art_of_boot.html