See Maurice Ashley's blog here. He's the international chess grandmaster, and his motto is, "Your passion is your window to the world."
In chess, retrograde analysis is a computational method used to solve game positions for optimal play by working backward from known outcomes (e.g. checkmate), such as the construction of endgame tablebases. In game theory at large, this method is called backward induction. For most games, retrograde analysis is only feasible in late game situations of reduced complexity, such as a chess position where few pieces remain in play.
The University of Pittsburgh published a list of seven things you need to do to solve problems.
"The measure of success is not whether you have a tough problem to deal with but whether it is the same problem you had last year." John Foster Dulles, Former US Secretary of State.
Some people play chess, some complete sudoku puzzles, some play video games -- explain why what you do works for you and how it might work for others.