The stupidity flip is the fastest way to find out whether you have a strategy. It takes about ten seconds per line. Tim Herbig uses it to pressure test whatever gets put in front of him. Here's how to run it: 1. Take your strategy statement and flip it to the opposite "Make our salespeople more efficient" becomes "make our salespeople slower." Obviously stupid. Which means you never made a choice, you stated a preference everyone in the building already holds. 2. Don't flip the whole…