I have just started to read another his book and I'm sure that George Polya's ideas is the best source for topicstarter. The second-best I can recommend is TRIZ

I have just started to read another his book and I'm sure that George Polya's ideas is the best source for topicstarter. The second-best I can recommend is TRIZ: https://en.wikipedia.org/wiki/TRIZ https://en.wikipedia.org/wiki/TRIZ