How do I get the most out of a bar soap like this and make it last?

To use the soap effectively and prolong its life, start by keeping it dry between uses. Use a well-drained soap dish or a rack that allows air circulation; letting the bar sit in water will cause it to soften and dissolve more quickly. For lathering, wet the bar and your skin, then rub the bar directly on the body or between your hands to create a rich lather. The soap is designed to lather easily and rinse off cleanly. After your shower or bath, rinse off any leftover suds from the bar and place it in its dry spot. For storage, keep it in a cool, dry place away from direct streams of water. If you use it in a shared bathhouse setting, consider having a personal carrying case. To integrate it into a routine, many people use such a bar as their primary body cleanser, appreciating the tangible, traditional experience. You can follow with a moisturizer if your skin tends to feel dry after washing, as with any soap. Remember, it is a rinse-off product, part of cleansing, and not a substitute for other aspects of skin care or a balanced diet.