Grace is a supernatural gift from God for our Salvation. You can read more about Sanctifying Grace and Actual Grace here. Here is a Prayer seeking graces from God.
O my God, remember that moment when, for the first time, Thou didst pour Thy grace into my soul, washing me from Original Sin, that Thou might receive me into the number of Thy children. O God, Thou Who art my Father, grant me in Thine infinite mercy, through the merits and Blood of Jesus Christ, and through the sorrows of the holy Virgin Mary, the graces which Thou dost desire that I should receive this day for Thy greater glory and my salvation.
O Heart of Love, I place all my trust in Thee, for though I fear all things from my own weakness, I hope all things from Thy goodness.
O purest heart of the Blessed Virgin Mary, obtain for me from Jesus a pure and humble heart. Amen.