So you've mastered barehanded spanking and you're itchin' for a new sensation? Try using an implement. Start with a paddle made of leather or wood. A light paddling will sting, but with a little more force you can create a heavier, "thuddier" sensation. Experiment with varying your pressure, layering lighter blows over heavier ones. Sting on top of thud can add up to a wonderfully complex mix of heat and ache that will sensitize your partner's skin for the next implement.
Next, try a riding crop—a thin, wickedly flexible rod with a little tab of leather at the tip. When brought down against your partner's buttocks, the crop creates a hot, slicing sensation that can be agonizingly pleasurable. Keep a light hand—a crop can break the skin when applied with too much force. A little pain is sexy, but scar tissue is not.