In order to prune arborvitae, junipers, and chamaecyparis, you will need the following: pruning sheers/clippers. Be careful when you prune these, because you should not clip the old wood. Look for branches that are forking together. Try to cut lightly, cutting small amounts at a time. Think about balance, when you are clipping. Therefore, you should focus on encouraging growth where it is thin and reducing it where it is heavy. You also should try to pay attention to encroachment of one tree on surrounding trees. Make sure that they have allowed other trees to have ample room. Do not led them encroach on others. These are relatively slow growing. Therefore, you should not prune too aggressively. Remove all dead leaves, back to the place where they begin to die off.