If every customer is using your product "correctly", you'll never learn anything interesting about what to do next.

I have a lot of faults. I often interrupt in meetings. I talk too loud. I talk too fast.

Entrepreneurship: 10% coach, 20% player, 30% cheerleader, 40% waterboy.

The only barrier to entry you can create is to consistently build a great product.

My downtime tends to resemble my uptime. Weekends are workdays, but toned down. Over the whole weekend, I may have five meetings, as opposed to six on a weekday. I used to play piano for 30 minutes at night, but I had to pull that out of my schedule. I don't have time for nonwork stuff.

Innovation is hard because solving problems people didn't know they had & building something no one needs look identical at first.

You can look at the cost structure of an incumbent company and discover: where are they not going to be able to drop their prices... because that business model is fundamental to the existence of the company.