Are there accepted approaches/starting points to solving common problems?

And if yes, where does one find the commonly accepted approaches?

For context, say you are asked to solve a churn problem. How do you get started on this? Do you read published literature? Medium articles? Ask your senior? Just know off the top of your head?

As someone early in their career I would like to know how to find the generally accepted approach of trying to solve a problem that has been solved before.

articles churn context datascience head literature medium solve