The Veritasium youtube channel has a few interesting videos related to this topic:

This one is on IQ: https://www.youtube.com/watch?v=FkKPsLxgpuY Pay attention to the stats on how IQ correlates to success (near the end).

This one is about becoming an expert: https://www.youtube.com/watch?v=5eW6Eagr9XA

This one is about someone who just worked harder than everyone else: https://www.youtube.com/watch?v=AF8d72mA41M