A small lump of clay on the table is easy to overlook. But a test piece can reveal how a rim feels in the hand, whether a curve holds its shape, or how a surface changes under light. I prefer a modest experiment with one question to a miniature version of an entire project.
Ask one clear question
Before shaping the clay, decide what you want to learn. If the question is about a handle, make only enough form to judge its width and grip. If you are exploring a shallow dish, spend your attention on the edge and the way the base meets the table.
Changing several things at once makes the result harder to read. A focused test gives you a useful comparison, even when the answer is simply that the idea needs another attempt.
Notice the hand and light
Look at the test from more than one angle, then pick it up. A profile that seems graceful on the table may feel awkward between the fingers; a textured surface may catch the window light in a way that changes the whole impression. These are small observations, but they can guide the next decision.
Photograph the piece beside a familiar object or a hand for scale. Without that reference, it is surprisingly easy to forget whether a curve was delicate or simply very small.
Save the answer with it
Keep a short note with the test: what you were trying, what surprised you, and what you might adjust next. A date helps when you return to the same idea after a pause. The note does not need to sound polished; it needs to make sense to you later.
A test piece is not a lesser version of finished work. It is a way to make the next step less abstract. Give it one question, look closely at the answer, and let the larger piece wait until you know a little more.