Completing Mishna Pesachim as a siyum to exempt the firstborn from fasting on the eve of Passover, and reciting Hadran. Three questions to ask a household prior to lighting the Shabbat lamp. Entering Shabbos with peace. Establishing an eiruv, legal Shabbat residence. Defining twilight. Stringency on Torah laws, leniency on Rabbinic laws in cases of uncertainty, like untithed produce and the arrival of night during twilight.