Best of the Web - GM's Don't List

The Alexandrian has a series of posts called GM Don'ts. They are all good:

• GM Don’t List #1: Morphing Reality
• GM Don't List #2: Rolling to Failure
• GM Don’t List #3: Resolution Dithering
• GM Don’t List #4: Thou Shalt Not Hack
• GM Don’t List #5: Not Knowing the Rules
• GM Don’t List #6: Choose Your Own Adventure
• GM Don’t List #7: Preempting Investigation
• GM Don’t List #8: Mysteries With No Clues
• GM Don’t List #9: Fudging