
Similar to the Animaniacs shorts of legend, but a little different for forum gaming.
First person posts a good idea, next person follows that good idea with a bad idea relating to that subject, then provides a new good idea.
Example:
Good idea: practicing your swordplay with a rapier.
Bad idea: practicing your swordplay with a swordfish.
And to start:
Good idea: turning off the lights to save energy.