Accumulate a handful of unmistakable abilities: I can reproduce a polished interface accurately. I can decompose a workflow into objects, states and transitions. I can identify what burden the human is carrying. I can choose a computer capability that helps. I can embody that capability through an interface primitive. I can turn the whole thing into a coherent flow. I can build the flow into something someone else can use. Do the same moves again and again until they become boring.