On Leil Hoshana Rabbah, many have a custom to stay up late, and some through the night, learning Torah and davening.

An esrog must come with a hechsher to verify that it is not grafted, or orlah, etc. This hechsher also certifies that, when applicable, shemitta was not violated.

One should do his part to ensure that all of Klal Yisrael have their Yom Tov needs. Otherwise, one’s own Mitzvas Simchas Yom Tov is considered severely deficient