The congregant leading the service does not wear a tallis for Minchah or Maariv, whether on Shabbos, Yom-Tov or Rosh HaShanah.1

Psalm 107 (beginning הודו; Siddur, p. 124) is recited before Minchah every Sabbath eve, unless that Friday coincides with a Yom-Tov or Chol HaMoed.2

Before Minchah every Shabbos eve, even when that Friday coincides with a Yom-Tov or Chol HaMoed, one recites the passage [from Tikkunei Zohar] beginning פתח אליהו (Siddur, p. 125-6) and the passage beginning ידיד נפש (p. 126).3

If Yom-Tov or Yom Kippur falls on Shabbos, and thus the eve of the festival or the eve of Yom Kippur falls on Friday, Psalm 107 is recited at Minchah.4