Learning Their Seforim at the Kever
Torah learning
Rav Avraham would relate a teaching of the holy Meor Einayim: the word sefer (ספר) has the gematria of 240, the same as shem (שם), which means both name and there. The essence of attaching oneself to the kever of a tzaddik, he taught, is therefore the learning of that tzaddik's seforim. Following this, Rav Avraham would prepare for a trip to a tzaddik's kever well in advance and speak about topics from the tzaddik's teachings, so that on arriving at the kevarim he would need to stay only a short time.
Source: Meor Einayim, as taught by Rav Avraham Brandwein