Problem solving is the art of being curious, and listening to find the real problem.

Ask yourself if what you make solves a problem for you.

Ask others if what you make solves a problem for them.

Ask yourself if what you make solves an existing problem.

Ask yourself if you made up a problem to solve.

Observe people when they use what you make.

Listen to people who comment on what you make.

Really observe people and listen to people who are frustrated with what you make.