Make an index card! Jules Verne did not patent his ideas, he just simply described them in his novels. In order to develop his technical and scientific knowledge, Jules Verne — starting in his youth and lasting throughout his life — collected new technical and scientific information from books, magazines and papers. Biographers state that his card index contained more than 20,000 entries with information about technology, geography, physics and astronomy.

Today many inventors maintain their own index cards. These cards contain information about physical, chemical and geometrical effects. There are also descriptions of successful methods and inventive tricks — information about new materials. In other words, everything that can contribute to the solution of a technical problem. 

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