1) Some have the custom to keep the citron upon which a blessing had been made during the festival, and make a spread from it. They then use it as a charm for someone who us having difficulty giving birth. (Kaf Hachaim)
2) One may not throw a lulav case which has verses from the Torah printed on it into the garbage. Instead, one must put it with the Sheimos (it must be buried). (Latter authorities)