It’s really easy to know if you are in the right job. If it matters how much you get paid, you are not in a job you really love. I’m not saying that you shouldn’t want to make more money. I’m not saying that you shouldn’t bust your ass to make as much money as possible. That’s not the issue. The issue is whether or not you truly love your job. If you love what you do so much that you are willing to continue to live like a student in order to be able to stay in the job, you have found your calling.