When St. Dominic founded the Order of Preachers he based it on the life of the early apostles. He desired to imitate them in zeal and missionary spirit. It is no surprise that Mary, the Queen of Apostles, would shower down blessings upon this Order. In the early Church Mary was there with the Apostles, encouraging them and renewing their spirits. She did it for the early Dominicans appearing to those like Dominic, Jordan of Saxony, Humbert of Romans, Reginald of Orleans and many others. She never lost faith in her Son and she continues to pour out graces upon we her adopted children. (photo by Fr. Lawrence Lew O.P.)
For the daily readings, see the USCCB. 
To renew or promise dedication to Our Lady with the Dominican Order, see OPVocations.org.