The laws and parameters of not eating before one makes havdala- what to do when has no supplies for havdala until the next day?

The division statements of havdala - kohanim, Leviim, Yisraelim

The source, history and text of the havdala said in the arvit prayer at the conclusion of Shabbat

The concept of ein osin mitzvot chavilot chavilot as applied to kiddush, havdala, and birkat hamazon

The principle and parameters of kiddush b'makom seudah: how much must one eat/drink, what is considered "one" location, what if there is a break between the kiddush and seudah

The concept of Pores mappah umekadesh on erev Shabbat and Yomtov- application to when Purim falls on a Friday when to have the seuda

The 4 cups of wine at the Pesach Seder reflecting the 4 stages of the redemption from Egypt- why use wine?

The rule of one sin offering being guaranteed by a back up chatas- analyzing the principle zeh achar zeh

The halachic and hashkafic difference between Pesach Mitzrayim and Pesach Dorot