I actually use fear and conditioning to get better results from my dice. Everytime a die fails a game-critical roll it gets sacrificed to the Dice Gods by fire, in front of all my other dice. Blank results have gone down by 75%!
I used to play D&D with a guy who would line up his dice on the edge of the sink so they could witness him flushing poorly rolling dice down the toilet.... He went through a lot of dice.