self education is my pick.

steve jobs had a good section in this speech about how it was impossible to know what learnings from his life would be useful in advance, but years later he could connect the dots and see how each experience shaped his life.

his line about how his calligraphy college class shaped apple’s type fonts sticks out to me. it took a decade of sitting on that information, just waiting to put it to use. lots of people don’t have the patience to learn without a practical goal in mind.