Part III-1. Reasons for Reserving the Eucharist; Prayer in the Presence of the Blessed Sacrament
49. "It is pertinent to recall that the primary and original purpose of reserving the sacred elements in church outside Mass is the administration of viaticum; secondary ends are the distribution of communion outside Mass and the adoration of our Lord Jesus Christ hidden beneath these same elements."  For "the reservation of the sacred elements for the sick . . . led to the praiseworthy custom of adoring the heavenly food that is reserved in churches. This worship of adoration has a sound and firm foundation,"  especially since faith in the Lord's real presence has as its natural consequence the outward and public manifestation of that belief.
50. When the faithful adore Christ present in the sacrament, they should remember that this presence derives from the sacrifice and has as its purpose both sacramental and spiritual communion.
Therefore, the devotion prompting the faithful to visit the blessed sacrament draws them into an ever deeper share in the paschal mystery and leads them to respond gratefully to the gift of him who through his humanity constantly pours divine life into the members of his Body.  Abiding with Christ the Lord, they enjoy his intimate friendship and pour out their hearts before him for themselves and for those dear to them and they pray for the peace and salvation of the world. Offering their entire lives with Christ to the Father in the Holy Spirit, they derive from this sublime colloquy an increase of faith, hope, and charity. Thus they foster those right dispositions that enable them with due devotion to celebrate the memorial of the Lord and receive frequently the bread given us by the Father.
The faithful should therefore strive to worship Christ the Lord in the blessed sacrament in a manner fitting in with their own way of life. Pastors should by example show the way and by word encourage their people. 
Churches Readily Accessible to the Faithful
51. Pastors should see to it that all churches and public oratories where the blessed sacrament is reserved are open at least several hours in the morning and evening so that the faithful may easily pray before the blessed sacrament.