Additionally in True Devotion to the Blessed Virgin Mary, Saint Louis de Montfort also gives some devotions to the Blessed Virgin Mary. 

1. Recite fives decades of the Rosary.
2. Fast on Saturdays
3. Fast on the Vigils of the Principle Feasts of the Blessed Virgin Mary
4. Recite the Angelus or at least three Hail Marys in the morning, at noon and in the evening at Vespers time.
5. Say the Litany of the Blessed Virgin Mary before bed.
6. Wear the Scapular of Our Lady of Mount Carmel
7. The devotion of the Three Hail Marys first thing in the morning and last thing at night.
8. Make the Fatima Pledge

Other Devotions

The Angelus

Help of Christians

Magnificat

Rosary of the Seven Joys or Franciscan Crown

Seven Sorrows of the Blessed Virgin Mary

A project of the One Holy Catholic Church

Practices of True Devotion to the Blessed Virgin Mary
Sermons of Saint Alphonsus, for the Second Lord’s Day after Epiphany: But, to obtain special favors in her honor certain devotions practiced by her servants; such as, first, to recite every day at least five decades of the Rosary; secondly, to fast every Saturday in her honor.  Many persons fast every Saturday on bread and water: you should fast in this manner at least on the vigils of her seven principle festivals.  Thirdly, to say the three Aves when the bell rings for the Angelus Domini; and to salute her frequently during the day with an Ave Maria, particularly when you hear the clock strike, or when you see an image of the Virgin, and also when you leave or return to your house.  Fourthly, to say every evening the Litany of the Blessed Virgin before you go to rest; and for this purpose procure an image of Mary, and keep it near your bed.  Fifthly, to wear the scapular of Mary in sorrow, and of Mount Carmel.  There are many other devotions practiced by the servants of Mary; but the most useful of all is, to recommend yourself frequently to her prayers.  Never omit to say three Aves in the morning, to beg her to preserve you from sin during the day.  In all temptations have immediate recourse to her, saying: “Mary, assist me.”  To resist every temptation, it is sufficient to pronounce the names of Jesus and Mary; and if the temptation continues, let us continue to invoke Jesus and Mary, and the Devil shall never be able to conquer us.