Organizations

The Apostleship of Prayer  
The Sacred Heart Apostolate
Pierced Hearts of Jesus and Mary 
National Enthronement Center 

Other Resources

Sacred Heart Devotion (Exhaustive Links)
Sacred Heart Devotionals
Heart to Heart
Devotion to the Sacred Heart 

Articles

Life of Fr. Mateo Crawley-Boevey
Apostle of Enthronement

Fr. John Hardon, SJ
Doctrinal Foundation of Devotion
The Sacred Heart and the Eucharist  
Devotion to the Sacred Heart Today

Msgr. Arthur Burton Calkins
JPII on the Sacred Heart and Reparation  

Articles on the Feast of the Sacred Heart

Dom Prosper Gueranger, OSB
The Feast of the Sacred Heart

Blogger "Rubrics and Ritual"
Masses of the Sacred Heart

Fr. Brian Dunn
Liturgical Theology of the Solemnity

Dalmais, Martimort, Jounel
Liturgy & Time (Revisions to 1970 Missal)