Gary Crossley, a specialist in career transitions, offers that we should strike a balance while selecting a career to pursue. Sound advice for striking the required balance is to use the ASAP method of career choice:
A = Assessment
S = Skills
A = Analysis
P = Preparation
He is not trying to rush things "As Soon As Possible". Rather, he illustrates four critical steps to success that have to be carried out in a timely and deliberate way. If you work through these four items you are likely to make a wise choice good for your particular situation.
Read more of Gary's thoughts on this matter at http://informationanthology.net/CareerMentor/Choosing-Career.html.