"Blessed is the person whose delight is in the law of the Lord, and in His (God's) law he/she meditates day and night." - Psalm 1:2 (Slight Paraphrase)
What you think about consistently or what you set your heart on, what your desire is.... is what will define, shape, or influence who you are, what you do, and how you live your life. If you spend your time thinking about God, the things of God, and the word of God, you will find that you will be closer to God, easier to fight temptations and sin, happier, have more peace, and your life will change for the better.
The word of God (The Bible) is food for our spirit, so the more we read and think about the word of God, the more "food" we are feeding our spirit. And the more food our spirit gets, the stronger our spirit will be.
God's blessing always follows those who love God, and who put God first in their lives. As children of God, and youth in Christ, we are to use our time, energy, talents, and strength for God. As people who love God and follow Him, God calls us to put Him first, to read His word, to think about Him, and set our eyes, minds, and hearts on Him.
Don't just read the bible and then forget about it, but read, it then take time through out the day to think about what you've read, and how you can apply it to your life. Let God's word change your life and shape you to become all that God made you to be.