How should I prune a cactus to promote healthy growth and maintain its shape?

To prune a cactus for healthy growth and shape maintenance, use clean, sharp scissors or pruning shears to remove any dead, damaged, or overgrown parts. Make cuts at a slight angle just above a healthy stem or branch. Avoid cutting too close to the main stem to prevent damage. Additionally, wear gloves to protect your hands from the cactus spines. Pruning should be done sparingly and only when necessary to avoid stressing the plant.