I didn't start a company but wrote an app I'm very proud of. And that app put me in a position to write a book for O'Reilly. I did lots of the coding and writing at 3 am when my wife was asleep and I was up with one of the kids. Kids are great at forcing you to focus and prioritize, things I was never great at before they arrived. And, kids teach you what's really important and that is a good lesson when running a company.