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. Thus it demands near-maximal effort, which is generally not enjoyable.

The comfort zone is not good in telling you what you should do or not do. Nor is it just these two categories. Stabbing yourself with a pencil is outside the comfort zone and bad for you. Walking is inside your comfort zone (running is not) but that doesn't mean you shouldn't go ...

Get outside your comfort zone but do it in a focused way, with clear goals, a plan for reaching those goals, and a way to monitor your progress. Oh, and figure out a way to maintain your motivation.