Psalm 1-6 (The Daily Walk Bible).
The introduction to the entire book suggests a 5 fold division in the book of Psalms. One of the reasons is because each section has a simple benediction at the end (Psalm 41:3 “Blessed be the Lord, the God of Israel, from everlasting to everlasting! Amen and Amen.”).
I love the synopsis that our devotional gave about the first 6 Psalms: “The gateway to the book of Psalms is guarded by two major declarations concerning God’s revelation of himself: He can be known through his Word, which brings blessing (Psalm 1), and he can be known in the person of his Son, who rules over creation (2). The servant of God can cling to him with confidence, knowing that God’s help and consolation are assured in both good times and bad. No foe (3) nor threat (4), no frustration (5) nor cause for fainting (6) can change the fact that God is in control.”
Psalm 2:1-2, 7, and 9 are Messianic and are used in Acts 4:25-28, Hebrews 1:5, and Revelation 2:26-27 (among other places).