Picture how you want the world to be. Work backwards from there. Unsure what you want it to be, or can't picture it? Think about existing things we have today.

Picture how you want the world to be. Work backwards from there. Unsure what you want it to be, or can't picture it? Think about existing things we have today. Break those things down to the concepts or dynamics that underly them. Recombine in weird ways for the hell of it, or merely as desired. Is there a missing component required to realize the rearranged puzzle? Maybe that's your revolutionary idea.