After reading Deep Work and 12 Week Year, this book was mostly a recap of concepts I was already familiar with. Some overlapping concepts included focusing on a long time horizon and progressively zooming in, aggressively time blocking and getting family/coworkers bought-in on your time blocked time, and the importance of defaulting to saying "no" so that you can say "yes" in the few cases it really matters.

I would recommend Deep Work before The One Thing and I might recommend 12 Week Year for someone who wants more specific action items, but The One Thing seems like a good slightly-less-opinionated-and-actionable alternative to 12 Week Year.

I definitely don't regret my time listening to the audiobook. It was a very easy and quick listen.