"The way that we choose careers is strange. We often choose a career based on opportunism (e.g., expected salary) or fear (e.g., what family may think). The result is that we end up in a place that’s not fully satisfying. That we pick careers in a haphazard manner is stunning given the fact that we spend nearly 100,000 hours working over our lifetimes.
So if opportunism or fear are not the best ways to choose a career, then what’s a better approach? I believe three main factors should drive a choice of career. The first factor is goals. What are your short-, medium- and long-term goals in life? And it’s very important to think about goals beyond just your career. The second factor is pleasure. What activities do you derive real enjoyment from? The third and final factor is skill or expertise. Where do your innate and learned skills and talents lie?
Consider a Venn diagram comprised of these three factors — goals, pleasures, and skills — and a fulfilling career likely resides at the center.
Finding a career at the center of this Venn diagram is simple in theory, but difficult in practice. The first challenge is to overcome inertia, moving beyond opportunism or fear as your selection criteria. The second challenge is managing and balancing other commitments in your life, such as financial or family obligations. The third challenge is to know yourself deeply. It’s surprising how few people take the time to truly understand their goals, pleasures, and skills. The fourth challenge is to identify a career that aligns to these three factors. Many careers will satisfy one factor, some two, but few will satisfy all three. For some people there may be no established career path that aligns to all three factors, which means you have to create a “custom” career.
How does one learn about their goals, pleasures, and skills, and a matching career? Through a process of contemplation, trial and error, and growth. You must contemplate and be deliberate in your actions, but allow your perspective to evolve over time, as you attain more experience in work and life. You must try a lot of different things to learn about yourself and how you respond to different activities and settings. As you hone your understanding of yourself, you must undertake deliberate practice within a specific domain for an extended period to advance your expertise and skill. Imagine starting your working life at the top of a funnel, and as you contemplate, experiment, and grow, you move down the funnel, and towards a better understanding of yourself and an ideal career."
(http://www.fernstrategy.com/2010/09/18/choosing-your-career/)