Maariv
Maariv begins with Shir Hamaalos. Say the Shemoneh Esrei for Shalosh Regalim, inserting the additions for Sukkos where indicated.
The joy of simchas beis hasho’eivah already begins on the first night of Yom Tov (albeit without musical accompaniment).
The Yom Tov meal
Say the Kiddush for Shalosh Regalim, inserting the addition for Sukkos where indicated. This is followed by first Leisheiv Basukkah and then Shehecheyanu.
Those not making Kiddush say Leisheiv Basukkah after Hamotzi.
During the Yom Tov meals, dip the challah into honey.
When eating in the sukkah (tonight and throughout Sukkos), have in mind that the sukkah commemorates the ananei hakavod that surrounded the Jewish nation when they left Mitzrayim.
Today’s ushpizin are Avraham Avinu and the Baal Shem Tov.
It is proper to share divrei Torah related to the ushpizin of the day. Indeed, the ushpizin of the day was a common theme in the Rebbe’s sichos throughout Sukkos.
When bentching after the Yom Tov meals, say Yaaleh Viyavo, inserting the words beyom chag hasukkos hazeh, beyom tov mikra kodesh hazeh. Additionally, say the harachaman for Yom Tov and the harachaman for Sukkos. (See below, “Hosafos,” for the laws that apply if you forgot to say Yaaleh Viyavo.)