I hope that I am posting this in time for you to pray this prayer with your family tonight for the feast of Christ the King.

Act of Consecration of the Human Race to the Sacred Heart of Jesus  
 
Most sweet Jesus, Redeemer of the human race, look down upon us humbly prostrate before Thy altar. We are Thine, and Thine we wish to be; but, to be more surely united with Thee, behold each one of us freely consecrates himself today to Thy Most Sacred Heart. Many indeed have never known Thee; many too, despising Thy precepts, have rejected Thee. Have mercy on them all, most merciful Jesus, and draw them to Thy Sacred Heart. Be Thou King, O Lord, not only of the faithful who have never forsaken Thee, but also of the prodigal children who have abandoned Thee; grant that they may quickly return to their Father's house lest they die of wretchedness and hunger. Be Thou King of those who are deceived by erroneous opinions, or whom discord keeps aloof; call them back to the harbor of truth and unity of faith, so that soon there may be but one flock and one Shepherd. Be Thou King of all those who are still involved in the darkness of idolatry or of Islamism; refuse not to draw them all into the light and kingdom of God. Turn Thine eyes of mercy toward the children of that race, once Thy chosen people: of old they called down upon themselves the Blood of the Savior; may it now descend upon them a laver of redemption and of life. Grant, O Lord, to Thy Church assurance of freedom and immunity from harm; give peace and order to all nations, and make the earth resound from pole to pole with one cry: Praise to the Divine Heart that wrought our salvation; to It be glory and Honor forever. Amen.

Saint Andrew Daily Missal, p. 1906, Indulgence of 300 days each time it is said. On the feast of Christ the King and the Sacred Heart of Jesus, when solemnly read with the Litany of the Sacred Heart before the Blessed Sacrament exposed one can gain 7 years indulgence and 7 quarantines, and a plenary indulgence supposing Confession and Holy Communion. The Act of Reparation below carries the same indulgence but only on the Feast of the Sacred Heart. This is the official text first composed by Father Ladislaus, SS.CC., and approved by His Holiness Pope Saint Pius X at the request of the Procurator General of the Congregation of the Sacred Hearts by Rescript of May 19, 1908. It was made obligatory to gain the indulgences of an Enthronement by a decision of the Sacred Penitentiary on March 1, 1918. [A.A.8. April 1, 1918, II. 154.]

http://www.dailycatholic.org/actstosh.htm