The Rubberband Ball
A month ago I started a rubberband ball. Each day, the mail at work is delivered with a lonely rubber band holding the letters. Individually the rubber bands don't bounce--they barely stay together unless you twist them enough.
But over time, something magical happens. The bands only need to be looped once, the shape holds itself together, and you have a ball. Start with nothing, chip away each day. In time, you'll start to bounce.