16 And he will turn many of the sons of Israel
to the Lord their God.
17 And he will go on before him
in the spirit and power of Elijah,
to turn the hearts of the fathers to the children,
and the disobedient to the wisdom of the righteous,
to prepare for the Lord a people made ready.”Luke 1:16-17
“Prepare the Way”  by John Piper
What John the Baptist did for Israel, Advent can do for us. Don’t let Christmas find you unprepared. I mean spiritually unprepared. Its joy and impact will be so much greater if you are ready!
That you might be prepared…
First, meditate on the fact that we need a Savior. Christmas is an indictment before it becomes a delight. It will not have its intended effect until we feel desperately the need for a Savior. Let these short Advent meditations help awaken in you a bittersweet sense of need for the Savior.
Second, engage in sober self-examination. Advent is to Christmas what Lent is to Easter. “Search me, O God, and know my heart! Try me and know my thoughts! And see if there be any wicked way in me, and lead me in the way everlasting!” (Psalm 139:23–24) Let every heart prepare him room… by cleaning house.
Third, build God-centered anticipation and expectancy and excitement into your home—especially for the children. If you are excited about Christ, they will be too. If you can only make Christmas exciting with material things, how will the children get a thirst for God? Bend the efforts of your imagination to make the wonder of the King’s arrival visible for the children. Fourth, be much in the Scriptures, and memorize the great passages! “Is not my word like fire, says the Lord!” (Jeremiah 23:29) Gather ‘round that fire this Advent season. It is warm. It is sparkling with colors of grace. It is healing for a thousand hurts. It is light for dark nights.
 John Piper, Good News of Great Joy: Daily Readings for Advent 2013 (Minneapolis, MN: Desiring God, 2013).