So very true. I think experience gives you the knowledge to recognise when something can be done better because without it you just think that this is the norm and how things are. Throw in a dash of frustration just before "there must be a better way" and you have yourself an idea with determination behind it which is going to solve that problem.

I always have a bunch of paper in my back pocket for writing stuff down on the spur of the moment and then I develop the idea as a mind-map, sleep on it, and then develop it some more.