Cf. Siddur, pp. 30-42

While saying Baruch SheAmar (p. 16) the two front tzitzis are held in the left hand. At the conclusion of the blessing one passes them over the eyes and kisses them.

Toward the end of Baruch SheAmar one pauses between מלך and משבח (p. 31), because the former word belongs to the preceding phrase.1

When saying the phrase פותח את ידיך (p. 33) one touches the hand-tefillin, and at ומשביע לכל חי רצון one touches the head-tefillin.2

If one is reading Pesukei DeZimrah and the sheliach tzibbur is about to say Kedushah (p. 52), Modim (p. 58) or Kaddish, one interrupts one’s prayers to read the whole Kedushah, including the passages that are added on Shabbos and Yom-Tov at both Shacharis and Mussaf. One likewise interrupts oneself to say Modim, but not to respond Amen from Tiskabel onwards. One does not interrupt oneself at this point to say בריך שמה (p. 69) or וזאת התורה (p. 70).3

[The Rebbe Shlita once wrote:] “I am not in favor of interrupting one’s prayers with additional words in the vernacular.”4