Tehillim: 55-59. Before Kol Nidrei: 115-123. Before going to sleep: 124-132. After Musaf: 133-141. After Ne'ila: 142-150.
Tanya: And from this (p. 511) ...the world to come." (p. 513).
Yom Kippur eve begin Hashem malach tageil etc. The verse Or zarua is said once, aloud. (p. 296) Al daat hakahal...is said three times, softly. Ki hinei kachomer is not repeated. Bedtime sh'ma as every Shabbat and Festival. Avinu malkeinu z'chor rachamecha etc. is said in every tefilla. On Rosh Hashana and Yom Kippur the Thirteen Attributes of Mercy (p. 183) are recited when the Scrolls are removed from the Ark, even on Shabbat. The daily Tehillim is said after Musaf.
Haftora at Mincha: Va'yhi d'var until uv'heima raba, then Mi Keil kamocha etc. L'David ori said at Mincha too. Open the Ark for Ne'ila service at Ashrei, and it remains open until after the entire Ne'ila Service. Kaddish in Ne'ila - l'eila ul'eila. Ein k'Elokeinu, Aleinu, no blessing by the kohanim.
Hayom yifneh is said even after dark. She'assa li kol tzorki (p. 8) is not said until tomorrow.
On Yom Kippur it works out that we actually fast 26 hours.1
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