A "Quiet Time" is a time each day that you get alone with God to read His Word, pray, and seek the Lord. Some people call it "Devotions."
Many Christians can testify that a daily quiet time is the most important factor in developing a relationship with the Lord and living victoriously. Why is it so important? 2 Chronicles 12:14 tells us that King Rehoboam "did evil because he did not set his heart to seek the Lord." Seeking the Lord on a daily basis can prevent us from doing evil. --Kent Crockett