Erin Callan, the former CFO of Lehman Brothers, writes in the New York Times of March 10 about her choices to devote all her energy to her job. 

I didn't start out with the goal of devoting all mof myself to my job. It crept in over time. [...] I did not know how to value who I was versus what I did. What I did was who I was. [...] Even at the best times in my career, I was never deluded into thinking I had achieved any sort of rational allocation between my life at work and my life outside.

I find it heartbreaking to read these kinds of regrets. One of the best reasons I have for being an info-entrepreneur is that I can balance all the parts of my life. Maybe not perfectly, but I know that I am in control of what choices I make, and that balance is possible.