I've often had an "aaah #$%^" moment in the shower, during a "bio break" or while driving. If I get stuck for more than an hour then I go home and will often figure the problem out.
One strategy that seems silly, but often really works, is to have a whiteboard in a room with a teddy-bear in a chair. If you get stuck then go explain to teddy how it works. In doing so you'll often find the problem.
Good..normally the biggest problems are solved when you change the envionment, i guess if we keep working in the same place and keep seeing the problem we tend to ignore minor problems that are actually the cause.
The Other Tesla David Blaza5 comments I find myself going to Kickstarter and Indiegogo on a regular basis these days because they have become real innovation marketplaces. As far as I'm concerned, this is where a lot of cool ...