I just read 17 Pithy Insights For Start-up Founders. Very valuable insights. I just want to add mine.
When work does not seem like work, when you do something that helps someone, when you are creating something you like, you know you are in a start-up.
I am on my fourth one now. I made money in some, lost in others. In the end, startup has become a way of life.
It is hard, but it has its wonderful rewards, and you learn a lot – about business, about people and about life.