The first and original novena - 9 days of prayer - were those kept between the Ascension of Our Lord an Whitsunday. It is a good traditional practice to imitate them and keep a novena to the Holy Ghost during this period, from the Friday after Ascension to the Vigil of Pentecost, inclusively.
NOVENA TO THE HOLY GHOST FOR THE SEVEN GIFTS OF THE SPIRIT
Act of Consecration to the Holy Ghost
On my knees before the great multitude of heavenly witnesses, I offer myself soul and body to Thee, Eternal Spirit of God. I adore the brightness of Thy purity, the unerring keenness of Thy justice, and the might of Thy love. Thou art the Strength and Light of my soul. In Thee I live and move and am. I desire never to grieve Thee by unfaithfulness to grace, and I pray with all my heart to be kept from the smallest sin against Thee.
Mercifully guard my every thought and grant that I may always watch for Thy light and listen to Thy voice and follow Thy gracious inspirations. I cling to Thee and give myself to Thee and ask Thee by Thy compassion to watch over me in my weakness. Holding the pierced Feet of Jesus and looking at His Five Wounds and trusting in His Precious Blood and adoring His opened Side and stricken Heart, I implore Thee Adorable Spirit, helper of my infirmity, so to keep me in Thy grace that I may never sin against Thee. Give me grace O Holy Ghost , Spirit of the Father and the Son, to say to Thee always and everywhere, "Speak Lord, for Thy servant heareth." Amen.
Prayer for the Seven Gifts of the Holy Ghost
O Lord Jesus Christ, Who, before ascending into heaven, didst promise to send the Holy Ghost to finish Thy work in the souls of Thy Apostles and Disciples, deign to grant the same Holy Ghost to me, that He may perfect in my soul the work of Thy grace and Thy love. Grant me the Spirit of Wisdom that I may despise the perishable things of this world and aspire only after the things that are eternal, the Spirit of Understanding to enlighten my mind with the light of Thy divine truth, the Spirit of Counsel that I may ever choose the surest way of pleasing God and gaining Heaven, the Spirit of Fortitude that I may bear my cross with Thee, and that I may overcome with courage all the obstacles that oppose my salvation, the Spirit of Knowledge that I may know God and know myself and grow perfect in the science of the Saints, the Spirit of Piety that I may find the service of God sweet and amiable, the Spirit of Fear that I may be filled with a loving reverence towards God, and may dread in any way to displease Him. Mark me, dear Lord, with the sign of Thy true disciples and animate me in all things with Thy Spirit. Amen.
For a series of indulgenced daily prayers throughout this period, see: http://www.ewtn.com/devotionals/pentecost/seven_tx.htm
The marvellous image here, showing the 7 Gifts of the Spirit, is from http://www.maryrosestudio.com/poster-7-gifts-of-holy-spirit.php