Find where movement loses its ability to continue. Name what the yes needs next. Build the smallest thing that can make it true. Then read whether progress actually began.
This is one turn of something longer. In real work the answer rarely arrives at the desk. You build the one thing, take it into a real situation, and let reality answer. What comes back tells you what to build next.
Progress is movement that survives your absence. That is the only test that matters.