Cf. Siddur, p. 203ff.

After the Torah Reading it is not our custom to say Psalm 111, nor any other Psalms or verses. The sheliach tzibbur merely says יהללו and the verses that follow.1

After the reading, the sheliach tzibbur begins reciting the Half-Kaddish when the wrapping of the Torah is almost completed. The congregant doing this loses no time in finishing the gelilah, saying Yehalelu, and returning the scroll to the Ark. In the meantime the Kaddish is recited slowly, so that it is concluded after the Torah has been replaced. In any event, the Kaddish should end as close as possible to the beginning of Shemoneh Esreh.2

The Rebbe Rashab writes3 in one of his maamarim: “The allusion to seudah shelishis in the verse, היום לא [תמצאהו בשדה] — ‘Today you will not [find the manna, i.e., the Shabbos bread, in the field],’4 means only that bread is not required at that meal; some food, however, should be eaten. As R. Yosei said,5 יהא חלקי מאוכלי ג' סעודות — ‘Would that mine be the lot of those who eat three meals [in honor of] Shabbos!’ ”

After Minchah on Shabbos either the rav or another articulate person should teach a maamar of Chassidus from memory. The speaker should first see to it that he himself thoroughly understands its concepts. He should also consider what wording will best convey them intelligibly to his audience.6

It is not our custom that a person observing yahrzeit during the coming week should lead the Grace after the Third Meal.7

When the second day of Yom-Tov falls on the eve of Shabbos, and the festival meal is extended into the Shabbos, those who have eaten at least a kazayis both by day and since nightfall (which of course means that they first covered the loaves and recited Kiddush) say רצה and יעלה ויבא in the Grace After Meals, in that order. The same principle applies [with regard to רצה and יעלה ויבא] when Rosh Chodesh falls immediately after Shabbos.8