I love this two-part mini-documentary by Adam Westbrook that I found on Vimeo:
The Long Game Part 1: Why Leonardo DaVinci was no genius from Delve on Vimeo.
It’s a wonderful reminder to us as artists that, first, we need to think about long-term success not immediate gratification, and, second, that the myths around “genius” and “talent” can be detrimental to young artists in understanding that our effort will be what defines the quality of our work over our lifetimes.
from Toothpaste for Dinner
On a related note, check out this infographic about how various artists through history reportedly spent their time: