Keep a journal of what excites you and gives you energy throughout the day. Make a list of the things in your professional life and personal life that you most enjoy, and that you most dislike. Over time you’ll start to see a pattern or patterns emerge and your true calling will come to light. This common thread is where your best future lies. (来源：英语杂志 http://www.EnglishCN.com)

The ultimate question you should be asking yourself is:   

The answer to this question will speak volumes about what’s important to you and how you should be spending your time from now on. Make an effort to find a career that will take you effortlessly downstream. Someone is making a living doing what you’d like to do, so why shouldn’t it be you?