What does it mean to seek first the kingdom of God? We seek God’s kingdom when we:

Listen to the voice of the King (Psalm 45:2).
Delight in the beauty of the King (Psalm 45:2).
Pray for the victory of the King (Psalm 45:3-5).
Praise the King at all times (Psalm 145:1-3).
Proclaim the mighty acts of the King and the glory of His kingdom (Psalm 145:4-7, 10-12).
Esteem the kingdom more highly than every other precious thing (Matthew 13:44-46).
Obey all the commands of the King (Matthew 7:24; 28:20).
Preach the Gospel of the kingdom to all nations (Matthew 24:14; 28:18-20).
Long for the coming of the kingdom in all its fullness (Matthew 6:10).