Imagine the following situation: You are in the office working on the next release of your software product. Suddenly your co-founder storms in and starts talking about the excellent new idea he just had.
You end up in a long discussion about the future of the company, only to resume work on the old release. You feel exhausted, not motivated and are happy when you finally leave the office.
That story is a symptom of a larger problem – we question what we are doing, whilst we are doing it.