To be able to say that "if we change our point of view in the following way ... things are simpler" is always a gain.

In a world in which the price of calculation continues to decrease rapidly, but the price of theorem proving continues to hold steady or increase, elementary economics indicates that we ought to spend a larger and larger fraction of our time on calculation.

Be approximately right rather than exactly wrong.

There is no data that can be displayed in a pie chart, that cannot be displayed BETTER in some other type of chart.

This is my favorite part about analytics: Taking boring flat data and bringing it to life through visualization.

It's better to solve the right problem approximately than to solve the wrong problem exactly.

An approximate answer to the right problem is worth a good deal more than an exact answer to an approximate problem.