In the months before my first son was born in 2007, I contemplated many things. One big one: how does “maternity leave” work when you’re self-employed? After talking with a number of self-employed moms, I came to the conclusion (as I wrote about in a HuffPo piece: http://www.huffingtonpost.com/laura-vanderkam/when-you-work-for-yoursel_b_49901.html ) that I should be prepared to work some, and realize that I was OK with that. People wrote me, aghast: “Just wait until you have the baby!” Well, I had the baby, and the only thing that was wrong about that op-ed was the “some.” By the time I had...