1. Look at the shrub and asses its branch pattern, peering inside it and pulling branches apart if necessary. Think about the overall shape you would like the plant to have, as well as how far apart you want the branches to be—this will obviously effect how many you will remove later.
2. Begin carving into the plant, using shears and secateurs to rough out the beginnings of a hidden shape. For a fully dense shape, you might not remove any branches at all, but treat the whole plant as one continuous surface. For a more open look, think out any branches that are too close together. Later that year, or after the next growing season, go back over your plant with a pair of shears or topiary clippers to consolidate the new growth.
3. A final, finished tamazukuri.