Similarly it's obvious that Steve Jobs is expert at what he does, but what is that, exactly? What did he practice for 10,000 hours?
Talent, expert level preparation, and success are related but the interaction between them is still mysterious.
I know I learn more from spending 1 hour trying to solve a new problem I have never tackled before than spending 10 writing yet another CRUD procedure or yeat another GUI for the database. Similarly, I improved my running faster (back when I was still running regularly) with runs that challenged me and on varied terrain more than I did from yet another tread mill run at a regular pace.
Someone could ask me "How do I make the perfect search engine?"
and I might reply "For any user and query make it return the most relevant results."
That is a simple instruction but actually complicated to do.