My second (much delayed) insight in this Entrepreneurship series is, Be careful what you ask for. As with Insight #1, this advice applies not only to entrepreneurs but to everyone. For instance, it is tempting to look at others who are making more money than us or living more flamboyant lifestyles and to say, "I want to do what they do!" But do you really? It is easy to see the "greener grass" but often not to see the responsibilities and obligations that come with the territory. Another way to put this is, You can do anything you want to in life, as long as you're willing to accept the consequences.
Something I've heard before and which I think is a great way to go about choosing a career path is to find something you are really passionate about *and* can make decent living at and pursue that. Those things that you are really passionate about but that won't generate income are better left to side projects or hobbies unless you are already financially secure or don't mind living the life of a pauper!
The bottom line of what I'm trying to say is that passion is as important as potential. Don't just look at the prestige or money associated with a given position or career but also how interested you are in doing that type of work because thirty years doing something you despise can seem like an eternity!