Anyone can think of ideas. I'm sure we've all got entire documents with lists of ideas we never followed up on.<p>The hard part is finding opportunities to create value for others (making stuff people actually want). Generally speaking, people already have the stuff they want that they can have. Now, I'm sure Paul Graham would say people's desires are infinite and there's still many unmet needs and wants. For All the stuff they don't have but want: well, there are major barriers to entry for those business ideas (flying cars), the exception being those ideas that were just recently enabled by another innovation (a Rare treat indeed). I think we've had this conversation before....<p>And, as he said in another post: you've got to be at the forefront of any industry. Live in the future. Meaning, use the latest tools and gizmos of any particular industry in order to help understand where things are and get a feel for them.