Become relentless without becoming reckless.

Relentless and reckless can feel identical from inside, since both involve pressing on when others would stop. The difference is whether you are still taking in information. Relentless keeps going and keeps checking. Reckless keeps going and stops looking, which is why it produces the occasional spectacular failure that undoes years of persistence.

Set one condition in advance that would make you pause, a specific signal rather than a feeling. Then keep going hard until you see it. Having a stopping rule is what lets you push much further than you safely could without one.