Cf. Siddur, p. 118ff.

The passages beginning רבונו של עולם and למנצח...בבוא are omitted on Shabbos and Yom-Tov, but are read on other days when Tachanun is omitted.1

At the conclusion of the third paragraph of the Shema, one adds the word אמת.

The two verses beginning יעלזו חסידים (p. 120) are said once; the two verses beginning הנה מטתו are said [in sequence] three times, and likewise the bracket of three verses beginning יברכך is said three times.