Heres a phenomenal blog post about one persons transition from banking to start-up life. Breaks it down into useful principles. Its a fantastic read for an insider perspective. A worthy quote:
The best thing Banking did for me was put me across the table from CEOs at companies like TheLadders and Rosetta Stone. It soon became clear to me that the jobs of these CEOs was to create value where there was none, and that my job was to help move that value around. This is a worthy calling, but not one that I was particularly fond of.
When I lost interest in my bosss job, and his bosss job, and all the way on up to John Mack, I quickly lost interest in my job and started treating it as a means to an end I just have to get through my analyst years and then I can do whatever I want. This attitude it toxic when youre at the same time asked to give up your nights and weekends.
I met with about 8 people. Every single person, VC and entrepreneur alike, said the exact same thing: if you want to learn how to run an internet company, go work at an internet company.
Much more good stuff in there too. Thanks for putting it out there!