What kind of wine is acceptable for use in Kiddush? What is excluded? The answer isn't so simple; it depends on how you understand a very specific requirement relating to the Beit HaMikdash.

If you're eating a meal and Shabbat enters, what should you do? What about if you're eating and Shabbat finishes? Is there a halachic difference between the two cases?

Why, if the Shabbat morning Kiddush consists of just a single beracha, is it called "The Great Kiddush"? Must a person refrain from eating before this Kiddush, as well as the evening Kiddush? Is a person allowed to make Havdalah before Shabbat officially ends?

Kiddush may only be made in the place where you eat. But what about different parts of the same house? Why do we make Kiddush in the synagogue, where people generally do not eat? And can Kiddush be made over bread instead of wine?

Does a person need to make Havdalah in order to do melacha after Shabbat? What exactly are the details of Kiddush on Friday night?

What is the proper text of Havdalah? If a person did not say Kiddush on Friday night, can he say it the following day? How late in the week can he say Havdalah? And what are the rules regarding eating before Kiddush or Havdalah?

What is the Biblical source for the mitzvah of Kiddush on Shabbat? Is Havdalah a Torah law, as well?

Why is there a prohibition of exercising on Shabbat? What is included in this prohibition?

Are you permitted to place a piece of cotton on a wound on Shabbat? What about pouring oil or water onto a piece of cotton that covers a wound?

What sort of medication is a person allowed to use on Shabbat? Under what conditions may a person brush his teeth on Shabbat?