This is a very interesting question. Below is my take on it. In case it sound a bit extreme: I might be wrong on some - or all - things. Still, this is my current "best guess". I actually believe this. Also, I've read and thought quite a lot about this subject for my own purposes.

If you're rethinking business anyway, you must be aware that the concepts of nonprofit and for-profit organizations will totally converge. It will all about how people behave, how they collaborate, what values they hold. Financial details will be just that, details. Umair Haque is totally right that we'll be seeing new organizational DNA, and this will all about openness, transparency and ethics.

Therefore, I think anyone seriously wanting to study this field should read books about social entrepreneurship and nonprofits.

The ones I've read are
- The power of unreasonable people
- Forces for good

Also of course The Future of Management (Gary Hamel), The Success of Open Source (by Steven Weber), The Starfish and the Spider and The Hacker Ethic.

For an example of the hybrid organization forms we'll be seeing more of in the near future, read up on Yunus' concept of "Social Business", described in "Creating a World Without Poverty".

Also, I think we'll see a move towards online collaboration, so you need to know everything about working from home and the emerging practice of coworking. Best for this are blogs I think. Web Worker Daily is a good start. I haven't read "Grown up Digital" by Tapscott yet, but I think that's a good one too. The practices and worldview of youth is totally different from that of the previous generation.

If you're wondering: "How are we gonna make money when we're giving everything away?" remember that the purpose of a business is not making money, but delivering value to customers. And yes, the financial community does not really understand that yet, to put it lightly.

Also study emerging trends in finance, such as new thinking on funding nonprofits (check out Tactical Philanthropy blog for instance) and peer to peer microfinance, best exemplified by Kiva. Money flows will change in an extreme way.

Speaking of P2P, check out http://www.p2pfoundation.net/ . It's all quite theoretical, but Michel Bauwens' obsession with "everything p2p" is not accidental. He's very well informed.

I don't think that today it's possible to make the right preparation, other than simply developing very high ethics, skills and a good reputation. Economic organization of the future (I'm talking about the whole economy, the whole of society here) will look nothing like we're used to. The thing that will be slowest to change is the physical capital.

For example, I really don't know if wall street has any importance in ten years. I mean that. The buildings will still be there though. Maybe the offices will be retrofitted as nice apartments...

Also, classic strategy is "dead". Because of repeated plays and transparency in operations, the ESS (Evolutionary Stable Strategy, the strategy that will crowd out all other strategies in the long-run) will be indistinguishable from principled behavior. This means you (as a person) don't have to follow a strategy anymore. Being principled, behaving ethically, is enough.

What does this means for organizations? Organizational boundaries will disappear, and accounting within one organization will become quite meaningless to measure success of the people included. The profit (if we're still using money that is..) might be made somewhere outside the organization.

But I want to say one more time that it's not possible to properly "prepare" anymore. The fortunate thing is that you don't have to. :) Just be ethical, principled, develop your skills, learn as much as you can, do good in the world (for example by doing good within your company), and you'll be alright - in the long run that is. If I know anything about the future, it's that it will be really fair to all.