Throughout eras and cultures, accomplishment seems to be a relative thing (simply being literate would have been fairly amazing a few millennia ago), and as we are all subject to the creep of entropy, my theory is that the best strategy is to push myself at the fastest, hardest pace that I can prudently sustain over the course of my life.
But what is “prudent?” That’s different for everyone, right? This relativism inclines me to believe that brutal honesty with myself is absolutely essential, for standards appear to change from person to person. I need to be able to assess my strengths and weaknesses without flinching, otherwise I won’t hit my targets in the most efficient manner, and if I waste energy, then I’ve shrunk my overall potential.