According to Seth Godin ideas come from 20 places


Ideas don't come from watching television
Ideas sometimes come from listening to a lecture
Ideas often come while reading a book
Good ideas come from bad ideas, but only if there are enough of them
Ideas hate conference rooms, particularly conference rooms where there is a history of criticism, personal attacks or boredom
Ideas occur when dissimilar universes collide
Ideas often strive to meet expectations. If people expect them to appear, they do
Ideas fear experts, but they adore beginner's mind. A little awareness is a good thing
Ideas come in spurts, until you get frightened. Willie Nelson wrote three of his biggest hits in one week
Ideas come from trouble
Ideas come from our ego, and they do their best when they're generous and selfless
Ideas come from nature
Sometimes ideas come from fear (usually in movies) but often they come from confidence
Useful ideas come from being awake, alert enough to actually notice
Though sometimes ideas sneak in when we're asleep and too numb to be afraid
Ideas come out of the corner of the eye, or in the shower, when we're not trying
Mediocre ideas enjoy copying what happens to be working right this minute
Bigger ideas leapfrog the mediocre ones
Ideas don't need a passport, and often cross borders (of all kinds) with impunity