Sukkos

When I enter the Sukkah, I have the following required kavanos, based on what I learned from “Ka’asher Tziva Hashem” by Rabbi Daniel Garfinkel:

I intend to fulfill the mitzvah to dwell in the sukkah, as Hashem commanded. Hashem commanded us to dwell in the sukkah as a remembrance of the Exodus from Egypt and the Clouds of Glory (Ananei HaKavod).

והיא העומדת לאדם לכפר במקום גלות
It (the Sukkah) stands as an atonement instead of exile.
(Pele Yoetz – 256)

According to my Artscroll Machzor, if it was decreed on Yom Kippur that we deserve exile, then dwelling in the Sukkah is considered by Hashem as if we were exiled.

וצונו לשמח שמחה של מצוה והוא סימן טוב לכל השנה שכתבו גורי האר”י ז”ל, שמי שיהא שמח וטוב לב ולא יצטער כלל בחג הקדוש הזה, מבטח לו שתעלה לו שנה טובה ויהיה לעולם שמח
He commanded us to rejoice with the joy of a mitzvah, and it is a good sign for the entire year. As the disciples of the Ari z”l wrote, he who is joyful and content, and does not experience any sorrow during this holy festival (Sukkos), is guaranteed that he will have a good year and will always be happy.
(Pele Yoetz – 256)

וכל שכן בחג הקדוש הזה דחיובא רמיא לתן לעניים חלק האשפיזין, שאם אינו נותן מקללין אותו קללות נמרצות האשפיזין, ואם יתן ישא רב ברכות מהם כמפרש בזהר הקדוש (ח”ג קד). אי לזאת יחרד האיש וילפת ויהא חפץ בברכה ולא יגרע מלהזמין על שלחנו איזה עני, ואם לא יוכל לעשות זאת לפחות יפריש מממונו לצדקה בערב הרגל על כל סעודה ויאמר בפה מלא, זה אני נותן לצדקה, בשביל חלק אברהם אשפיזא קדישא, וזה אני נותן בשביל חלק יצחק אשפיזא קדישא מסעודתי, וכן על זה הדרך, או ישלח מאכל לעני קדם כל סעודה, ובזה ישא ברכה ורב טוב

And all the more so during this holy festival (Sukkos), where there is a significant obligation to give the poor the portions of the Ushpizin. If one does not give, the Ushpizin curse him with severe curses. But if he does give, he receives abundant blessings from them, as explained in the Holy Zohar (Vol. 3, 104). Because of this, a person should be eager and enthusiastic to receive the blessing and should not refrain from inviting a poor person to his table. If he cannot do this, at the very least he should set aside money for charity for each meal on erev Yom Tov, and say aloud, “This money I am giving to charity for the portion of Avraham Ushpiza Kadishah; and this money I am giving to charity for the portion of Yitzchak Ushpiza Kadishah from my meal,” and so on in this manner. Or he should send food to a poor person before each meal, and by doing so, he will receive a blessing and abundant good.
(Pele Yoetz – 256)

Rabbi Daniel Glatstein, in “The Mystery and the Majesty” (pages 307 – 310), presents various sources to demonstrate that fulfilling the mitzvah to dwell in the succah serves as a segulah to live another year and perform the mitzvah again, as well as a segulah for living to at least eighty years old.