The Great Lenten Prayer of St Ephraim:

O Lord and Master of my life, take from me the spirit of indifference and discouragement, lust of power and idle chatter.
(Prostration)

Instead grant unto me, Your servant, a spirit of wholeness of being, humility, patience and love.
(Prostration)

O Lord and King, grant me the grace to be aware of my sins and not to judge my brother. For You are blessed now and ever, and unto the ages of ages. Amen.
(Prostration)

O God, Have mercy on me a sinner(12 times, with as many bows, and then again the whole prayer from the beginning throughout, and after that one great prostration)

This prayer, written by St Ephraim the Syrian in the 4th century, is recited at every Lenten service and also in private devotions, and is accompanied by prostrations. The 40-days of Lent is primarily about repentance; an attitudinal change, a shift of focus away from ourselves and to God, utilizing such tools as prayer, fasting and charity.