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Take ownership and fix issues, make this a habbit and do it often, not a one-time situation. Depending on your role this can be code level, architecture, people related, hiring, manual processes, etc.

The best signal is the thing most people are frustrated with but never seem to find time to get to.

As you move up in your career you will be faced with more difficult problems and challenges, especially those with no clear answers or path to follow.