Blessed be the God and Father of our Lord Jesus Christ, the Father of mercies and God of all comfort.
2 Corinthians 1:3 (NASB)
One of the most common forms of Jewish prayer was to praise God and bless His name at the very beginning of their prayer. It was their way of glorifying Him and showing Him their gratitude. David himself gives an example of this when he says in Psalm 34:1: "I will bless the Lord at all times: his praise shall continually be in my mouth. My soul shall make her boast in the Lord: the humble shall hear thereof, and be glad."
This is an attitude that we Christians today should have in our prayers. It's not that you shouldn't present your requests to Him, but praising and glorifying God would be the best attitude to adopt before telling Him your needs. We must praise the Lord for who He is. Paul does not just praise God, knowing who he was speaking to, he emphasizes the relationship between God and Jesus Christ.
Referring to God as the father of mercy, Paul relates three words that are part of God's attributes: Love, Mercy and Grace. If we are saved today, it is because of God's love, mercy and grace. When he talks about God's comfort, he means that God always comforts us in any situation, any place, and at any time. Better than you, God knows your suffering. He will provide for your needs whatever the circumstances. This is why you and I must always praise and glorify Him whenever we enter into His praise in prayer.
May the grace and the peace of God be with you all.