Putting God first is the most important thing that one should do. It will bring the most glory to God, which He requires. In fact God created all things for His glory. Yet God does not need glory because He is totally selfsufficient and lacks nothing. Since God lacks nothing, why does God want us to glorify Him? It is for our own good and the good of the world. Like one who throws a ball on a wall and it bounces back to him, so it is with glorifying God. Glorifying God has possitive boomerang effects on the one who glorifies Him.
Many person wrongfully think, consciously or subconsciously, that when they give or surrender to God they are losing. So they are detered from committing themselves to God. But let me tell you, they are DEAD WRONG. The bible says, he that lose himself by surrendering to Christ will find himself. So by losing one's self he gains and by refusing to surrender one's self to God he loses.
God's perfect plan for us is to have life to the full, but the devils plan is to rob us of it, kill and destroy us, John 10:10. How can we prevent the devil from doing this and experience the full life that God has for us? Jesus answers the question: He says, "Seek ye first the kingdom of God, and His righteousness; and all these things shall be added unto you." All these things includes everything that will cause you to experience the life that Christ has for us in full. Therefore, PUT GOD FIRST.