As the story opens in 1 Samuel 17 we learn that David was the youngest of 8 brothers. As a young man, what did David spend most of his time doing? He was a shepherd charged with watching over his father's sheep. And what do you suppose David did during all those lonely hours on the hillsides of Bethlehem as he watched the flock? He spent a lot of that time talking to and worshipping God.
Have you ever wondered why when every fighting man in Israel, right up to King Saul, was scared spit-less of Goliath, David was not? What did David have that they did not? David had an intimate and growing relationship with the God of Israel. You see, my friend, before you can ever be ready to face the giants in your own personal Valley of Elah, you must first have spent time alone with God on your own personal hills of Bethlehem.
In order to face your giants you must be spending time alone with God in prayer, worship and the study of His Word - not for sermons but for yourself. Nothing else will be able to give you the courage you will ultimately need when you come against your giant face-to-face. Your first need in order to face the giants in your life and ministry is communication with God. Never underestimate the power and preparation that comes from spending time alone with God.