Ask every one to enter in silence and reverence to the Church or the Chapel of the Blessed Sacrament. Kneel down on both knees before Him and make the sign of the Cross. Remember that it is God who is substantially present in that piece of bread. 

After settling down on one of the pews or prayer stool, kneel and make a prayer to prepare your heart. It can be spontaneously made by yourself or taken from some prayer book. We recommend this prayer

“Oh Sweet Jesus who, hidden under the Eucharistic veil, piously listen to our humble pleadings, and present them to the Highest’s throne, receive now the ardent desires of our hearts. Enlighten our minds, reaffirm our wills, revitalize our constancy, and ignite in our hearts the flame of a saintly enthusiasm, so that, surpassing our littleness and conquering every difficulty, we may offer you tribute worthy of your greatness and majesty, and suitable to our longings and saint wishes. Amen.”

During the preparation for adoration contemplate in silence thanking God for this opportunity given in adoration and also think over on your sins and ask for forgiveness for them.

Suggested bible readings:

Psalm 91

Psalm 27

Psalm 51 - for forgiveness of sings

You can choose a passage right then and there, but it’s also convenient that you read the day’s Gospel, or pick a reflection from your prayer book. After this reflection, stay in silence and meditate on what you just read. It’s important that in this moment you try to silence your mind and heart, reject distracting thoughts, and listen to what God is telling you. Silence is the door that predisposes the soul for listening. If you read a scene from the Gospel, you can imagine it and meditate about what it tells you, about how you participate in it, and about the feelings and thoughts that this reading arouses in your heart.

This is a very useful personal practice. You can keep a diary especially for the Blessed Sacrament where you write some meditations about what you just thought and felt. This is a memory aid for your spiritual life and it reminds you of the moments you’ve just experienced and the insights gained therein, before God Himself. Being able to go back to our encounters with the Lord strengthens us when times are hard.

After your meditation, you can pray the Rosary, the Via Crucis (Way of the Cross), another prayer about the Eucharist, or the day’s Liturgy of the Hours (the latter according to the time of your visit). 

In the presence of the exposed Blessed Sacrament, you can receive Him in your heart by doing a spiritual communion. This form of (small-c) communion is always something to do if by some impediment you can’t receive the Sacrament of the Eucharist (for example you have failed to keep the 1-hr minimum fast, or are not in a state of grace). Here is one possible prayer to say in this instance (though it’s not the only one, there are many others you can consult). After the spiritual communion, you can do some variation of the Chaplet of the Five Wounds, which consists of praying five times the Our Father, the Hail Mary and the Glory Be in memory of the five wounds of Christ Crucified, and an additional Our Father for the Pope.