I saw this blog from Jeffrey Yao on investing in your career, and thought it would be a great editorial. It echoes a lot of what I’ve written in the past, you can’t know everything, but you have to keep doing it.
I like his advice, and while I’m not sure in which order I’d invest in those things (likely an “it depends” scenario), I do think that he has three important ways to look at your learning.
I also wouldn’t recommend, or have anyone blogging, that they are learning or doing something so they have more free time. If you are making more time for work, then you should be moving your investment into areas that will help you company.