Stop trying to make the one great thing. Build a body of work, and let the great ones show up in the pile.

Nobody can tell in advance which piece will be the one that matters, including the person making it. The ones that land are usually identified afterward, by other people, and often they were not the pieces their maker was betting on. Aiming directly at greatness mostly produces stiffness and long delays.

Shift your attention from the single piece to the accumulation. Work at a pace you could keep for years, and let the question of which ones were good be answered later by someone else.