More information about personal consecration to the Immaculate Heart of Mary using St. Louis de Montfort's formula can be found here
By Saint Louis-Marie Grignion de Montfort:
O Eternal and incarnate Wisdom! O sweetest and most adorable Jesus! True God and true man, only Son of the Eternal Father, and of Mary, always virgin! I adore Thee profoundly in the bosom and splendors of Thy Father during eternity; and I adore Thee also in the virginal bosom of Mary, Thy most worthy Mother, in the time of Thine incarnation.
I give Thee thanks for that Thou hast annihilated Thyself, taking the form of a slave in order to rescue me from the cruel slavery of the devil. I praise and glorify Thee for that Thou hast been pleased to submit Thyself to Mary, Thy holy Mother, in all things, in order to make me Thy faithful slave through her. But, alas! Ungrateful and faithless as I have been, I have not kept the promises which I made so solemnly to Thee in my Baptism; I have not fulfilled my obligations; I do not deserve to be called Thy child, nor yet Thy slave; and as there is nothing in me which does not merit Thine anger and Thy repulse, I dare not come by myself before Thy most holy and august Majesty. It is on this account that I have recourse to the intercession of Thy most holy Mother, whom Thou hast given me for a mediatrix with Thee. It is through her that I hope to obtain of Thee contrition, the pardon of my sins, and the acquisition and preservation of wisdom.
Hail, then, O immaculate Mary, living tabernacle of the Divinity, where the Eternal Wisdom willed to be hidden and to be adored by angels and by men! Hail, O Queen of Heaven and earth, to whose empire everything is subject which is under God. Hail, O sure refuge of sinners, whose mercy fails no one. Hear the desires which I have of the Divine Wisdom; and for that end receive the vows and offerings which in my lowliness I present to thee.
I, N_____, a faithless sinner, renew and ratify today in thy hands the vows of my Baptism; I renounce forever Satan, his pomps and works; and I give myself entirely to Jesus Christ, the Incarnate Wisdom, to carry my cross after Him all the days of my life, and to be more faithful to Him than I have ever been before. In the presence of all the heavenly court I choose thee this day for my Mother and Mistress. I deliver and consecrate to thee, as thy slave, my body and soul, my goods, both interior and exterior, and even the value of all my good actions, past, present and future; leaving to thee the entire and full right of disposing of me, and all that belongs to me, without exception, according to thy good pleasure, for the greater glory of God in time and in eternity.
Receive, O benignant Virgin, this little offering of my slavery, in honor of, and in union with, that subjection which the Eternal Wisdom deigned to have to thy maternity; in homage to the power which both of you have over this poor sinner, and in thanksgiving for the privileges with which the Holy Trinity has favored thee. I declare that I wish henceforth, as thy true slave, to seek thy honor and to obey thee in all things.
O admirable Mother, present me to thy dear Son as His eternal slave, so that as He has redeemed me by thee, by thee He may receive me! O Mother of mercy, grant me the grace to obtain the true Wisdom of God; and for that end receive me among those whom thou lovest and teachest, whom thou leadest, nourishest and protectest as thy children and thy slaves.
O faithful Virgin, make me in all things so perfect a disciple, imitator and slave of the Incarnate Wisdom, Jesus Christ thy Son, that I may attain, by thine intercession and by thine example, to the fullness of His age on earth and of His glory in Heaven. Amen.
Saint Louis-Marie Grignion de Montfort, is still known today as the great promoter of living a life of consecration to Jesus through Mary. He taught that very simply, by consecrating or surrendering ourselves to the Immaculate Heart of Mary, we are telling God that we want to do everything in our lives “by Mary, with Mary, in Mary and for Mary; so that we may do them all the more perfectly by Jesus, with Jesus, in Jesus and for Jesus.”
In the early eighteenth century, Saint Louis de Montfort wrote a book to teach others about his simple secret to holiness entitled, True Devotion to Mary. For hundreds of years, the simplicity of this teaching has proven to be within reach for everyone, whatever their state of life.
Saint Louis de Montfort wrote, “All our perfection consists in being conformed, united and consecrated to Jesus Christ; and therefore the most perfect of all devotions is, without any doubt, that which the most perfectly conforms, unites and consecrates us to Jesus Christ. Now, Mary being the most conformed of all creatures to Jesus Christ, it follows that, of all devotions, that which most consecrates and conforms the soul to Our Lord is devotion to His holy Mother, and that the more a soul is consecrated to Mary, the more it is consecrated to Jesus.
“Hence it comes to pass that the most perfect consecration to Jesus Christ is nothing else but a perfect and entire consecration of ourselves to the Blessed Virgin….”
To imitate the ‘faithful Virgin’ means to keep her Son’s commandments.”
On December 8, 2003, to commemorate the 160th anniversary of the publication of True Devotion to Mary, Pope John Paul II wrote, “I myself, in the years of my youth, found reading this book a great help. ‘There I found the answers to my questions,’ for at one point I had feared that if my devotion to Mary ‘became too great, it might end up compromising the supremacy of the worship owed to Christ’ (Dono e Mistero, Libreria Editrice Vaticana, 1996; English edition: Gift and Mystery, Paulines Publications Africa, p. 42).
Under the wise guidance of Saint Louis Marie, I realized that if one lives the mystery of Mary in Christ this risk does not exist.”
 Saint Louis de Montfort, True Devotion to Mary, (TAN Books and Publishers, Inc., Rockford, IL 1985), p. 161, #257
 Saint Louis de Montfort, True Devotion to Mary, (TAN Books and Publishers, Inc., Rockford, IL 1985), p. 77, #120
 Pastoral Letters of the United States Catholic Bishops, Volume 111, 1962-1974, (United States Catholic Conference, Washington, D.C., 1983), Behold Your Mother: Woman of Faith, p. 432
 Pope John Paul II, Letter to the Montfort Religious Families on the 160th anniversary of the publication of the ‘True Devotion to Mary’ by Saint Louis de Montfort as cited in L’Osservatore Romano, (Vatican City, N. 5 – 4 February 2004), p. 3
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Oh Most Holy Trinity,
Father, Son, and Holy Spirit,
I adore Thee profoundly.
I offer Thee the most precious Body, Blood, Soul and Divinity of Jesus Christ, present in all the tabernacles of the world,
in reparation for the outrages, sacrileges and indifferences by which He is offended.
By the infinite merits of the Sacred Heart of Jesus and the Immaculate Heart of Mary,
I beg the conversion of poor sinners.
My God, I believe, I adore, I trust, and I love Thee!
I ask pardon for those who do not believe, do not adore, do not trust and do not love Thee.
(say 3 times)