This is an approach that many are known to use - for example, in the autobiography "Surely you must be joking, Mr. Feynman!", Feynman notes that he keeps about

This is an approach that many are known to use - for example, in the autobiography "Surely you must be joking, Mr. Feynman!", Feynman notes that he keeps about a dozen problems in the back of his head, and sometimes he'll get a flash of inspiration on one & solve it, or come back to it and investigate further & make more progress. This approach transcends disciplines I've found, although I've rarely had to apply it to coding.