101. Refer to any new NPC as Bob.
102. Whenever you have to ask an NPC anything, tell the DM you're going to talk to Bob.
NB: This works extremely well on paladins, by the way. They tend to get very righteous if you get their name wrong.
"I am Sir Balin, Master of Brightcandle Keep, Slayer of Marathalax, Saviour of the Thousand Souls!"
"Oh, hey guys, look, it's Bob."