Above is a link to an article one of my professors posted. This article summarizes and quotes some of the advice given in a self-help career book from 1949 titled, "How to Avoid Work." The idea here is that work is bad, career passion is good.
There are lots of great quotes from the book, as well as similar advice from people like John Cleese and Neil Gaiman, among others.
One idea in particular struck me. You may be familiar with this trick. The book suggests a "what if?" scenario. The question it poses is, "What would you do if money were no object?" I don't have an answer for this right now, but I will definitely be giving it some thought.
Another particularly powerful point was the view offered on time. To summarize the author, William J. Reilly, everyone in the world has the exact same amount of time in each day. The difference in productivity, success and happiness has nothing to do with the amount of time we have, but the way in which we utilize that time. So much for the "I don't have enough time," excuse.
The article is long and offers oodles of useful information, so I will be rereading it several times myself. I suggest that you do the same! Even if you are happy in your career now, applying some of the self-checks offered in this article can help you make sure that you stay on the right career path for you!