Unless you are working as a researcher in a very specific field you are unlikely to be breaking through frontiers. I find that focusing and furthering my skill

Unless you are working as a researcher in a very specific field you are unlikely to be breaking through frontiers. I find that focusing and furthering my skills in practical areas brings me the satisfaction of accomplishments. So far I have learnt carpentry skills, taken up several musical instruments, learnt foreign languages, learnt to cook signature dishes. I'm not sporty, but even bettering my record for a 12km run is cool.