I was reading one of the blog posts from AKF Partners the other day, where they talk about the business skills that need to be acquired by Technology Executives.
It is pretty coincidental, that I started on this exact quest some time ago.
The approach is pretty simple.
1) Got to personalmba.com recommended reading list http://personalmba.com/best-business-books/
2) Read one book on each topic - whenever you have time
3) So far I understood Competitive Strategy, Positioning and a very basic way to read financial reports and a number of other skills too.
4) I felt this was the best approach in Silicon Valley - short of a full time MBA program.