It is particularly important to eat at least one k'zayit (approx. 1 oz.) of bread on the first evening of the festival in the Sukkah, between nightfall and midnight. Prepare a meal and invite your family and friends over so that they too can participate in this special mitzvah.
A special blessing is recited when eating in the Sukkah:
Transliteration:
Ba-ruch A-tah Ado-nai E-lo-he-nu Me-lech Ha-olam A-sher Ki-de-sha-nu Be-mitz-vo-tav Ve-tzi-va-nu Lay-shev Ba-Sukkah.
Translation:
Blessed are You, L-rd our G-d, King of the universe, who has sanctified us with His commandments, and commanded us to sit in the Sukkah.
One should look at the Sukkah's sechach roof covering while reciting the blessing.
On the first and second nights, the one who recites the Kiddush recites the blessing on the Sukkah at the end of the Kiddush. All others recite the blessing after reciting the blessing on the challah bread.
For the rest of the festival, all meals should be eaten in the Sukkah. Many have the custom to eat any food or drink only in the Sukkah.
Throughout the holiday of Sukkot, the above blessing is recited whenever one eats a meal that includes bread, cake or other grain-based food in the Sukkah.
It is the custom of most communities to also eat in the Sukkah on Shemini Atzeret--the "eighth day" following the seventh day of Sukkot--but without making the special blessing.