Knowing God is a lifelong task. There is no one silver bullet that will suddenly cause you to know Him deeply. Ultimately the biggest part of knowing God has nothing to do with knowledge and everything to do with character and our response to Him. The more we humble ourselves the more we will experience his closeness. The more we pursue encounters with Him, the more we will experience Him on a tangible level. The spiritual disciplines of prayer, fasting, and worship help this to happen. This cultivates a heart that makes reading the Bible very profitable and enjoyable too. People often have misconceptions of God, though and so having a right view of Him can really help speed the process along. A.W. Tozer has written two books on the attributes of God that we recommend. Knowledge of the Holy and the longer version Attributes of God.