We really need to get out of comfort zone and practise
We really do need to sacrifice to give up on many things 
DUBNER: Meaning people are trained from a very early age to identify pitch, yeah?
ERICSSON: Well, that’s the only way you can identify the meaning of the words, because in Mandarin, the difference between different words is just the difference in their tone.
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ERICSSON: If you compare the kind of music pieces that Mozart can play at various ages to today’s Suzuki-trained children, he is not exceptional. If anything, he’s relatively average.
For his time, he was excellent. But over time, we humans generally become more excellent.
He thinks we’ve gotten so much better primarily because we’ve learned how to learn [and that the teachers have passed their experience on us]
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there’s no magic bullet. Improvement comes only with practice — lots and lots and lots of practice.
ERICSSON: We found that the average of that elite group was over 10,000 hours by the time they reach 20.
“deliberate practice involves well-defined, specific goals, and often involves improving some aspect of the target performance. It is not aimed at some vague, overall improvement.”
“Deliberate practice takes place outside one’s comfort zone and requires a student to constantly try things that are just beyond his or her current abilities.” That sounds horrible, first of all. You write, “Further thus it demands near-maximal effort, which is generally not enjoyable.”
Deliberate practice relies on this fact that if you make errors, you’re going to find ways to eliminate those errors. So if you’re not actually stretching yourself outside of what you already can do, you’re probably not engaging in deliberate practice.