Gretchen S. I was just posting elsewhere that my inability at prep led me to develop a peculiar adventure creation process that hinges on improvising the first few sessions and developing the implications of such improvised content between each session.

But from a design viewpoint I have been finding the profusion if random scenario generation tools within the OSR very handy. I am particularly fond of Sine Nomine Publishing (Stars Without Number, Red Tide, Silent Legions, Godbound) material.