For the last month or so I’ve been practicing James Altucher’s habit of writing down ten ideas every day.
I agree with Altucher that you can exercise the “idea muscle” and improve your idea-generating abilities. Almost any kind of intellectual activity can be improved with practice, and at the same time degrades with lack of use. I’m not even sure that I believe in “general intelligence” anymore. Human beings are either good or bad at doing particular things. 95% of that ability is determined by the amount of active practice (not just practicing but actively trying to improve your skills and knowledge). But what about innate ability? Sure, we all have genetic proclivities, but babies who might become geniuses still can’t do anything except cry and shit their diaper. Life takes practice.