Cf. Siddur, p. 118ff.

One does not say רבונו של עולם הריני at the bedtime Shema on Friday night.1 One says השכבנו only until סכת שלומך. Vidui (the confessional prayer) is omitted, as is Psalm 51 (למנצח בבוא).

The above also applies to festivals,2 as well as to Rosh HaShanah and Yom Kippur.