Many of us don't feel in control of our careers. Sure, we'd love to have jobs that inspire and challenge us, but so much of the factors that go into creating those dream gigs seem external to us. First, the job has to exist. Then, we have to persuade someone to hire us. Finally, we have to hope that the job doesn't change into something we don't want to do over time. We'd have better luck finding a unicorn, right? Wrong.