If there's ever an example of the importance of making bold bets and focusing on what you love, it's Twitter.

The Internet destroyed most of the barriers to publication. The cost of being a publisher dropped to almost zero with two interesting immediate results: anybody can publish, and more importantly, you can publish whatever you want.

Successful businesses measure and count things. I think that's a safe assumption on top of which we can drop the following hypothesis: unsuccessful business either measure nothing, the wrong things, too many things, or finally, they measure the right things but they don't communicate the measurements efficiently.

Once in a rare while, somebody comes along who doesn't just raise the bar, they create an entirely new standard of measurement.

The way you build trust with your people is by being forthright and clear with them from day one. You may think people are fooled when you tell them what they want to hear. They are not fooled.

Managing by trying to be liked is the path to ruin.

The beauty of Twitter is that more and more people are flocking to it because it's shrinking their world.