This is taken from Harvard's "Management Tip of the Day" on March 22:
If you’d like to make a career transition but you’re worried about leaving a stable job, how do you take the leap? And how do you decide on your next move? Start by following your energy and interests. Pay attention to what engages and excites you. What stimulates your intellect? Once you know what you want to pursue, learn more about the work involved through research and networking. Instead of making a huge change all at once, try out the work in a low-risk way by taking on side projects or consulting. Remember that creating a fulfilling career is an ever-evolving process.
You can read the full article here.