This information is from St. Peter's List. You can find it here.
1. Come Holy Spirit...
Father Ted Hesburgh, was the President of the University of Notre Dame for 35 years, "The Holy Spirit is the light and strength of my life, for which I am eternally grateful. My best daily prayer, apart from the Mass and breviary, continues to be simply, 'Come, Holy Spirit.' No better prayer, no better results: much light and much strength."
“No one can say ‘Jesus is Lord’ except by the Holy Spirit.” Every time we begin to pray to Jesus it is the Holy Spirit who draws us on the way of prayer by his prevenient grace. Since he teaches us to pray by recalling Christ, how could we not pray to the Spirit too? That is why the Church invites us to call upon the Holy Spirit every day, especially at the beginning and the end of every important action.
2. Thy will be done.
The short prayer thy will be done invokes the prayer our Savior taught us – the Lord’s Prayer. Though saying the invocation softly under your breadth certainly calls to mind the entirely of the Lord’s Prayer, the specific line reads in full – thy will be done on earth, as it is in heaven.
3. My God and my all.
Deus meus et omnia! The short invocation my God and my all has a long history in the Church and currently serves as a motto within the Franciscan Order. The origin of the phrase from a Franciscan perspective comes from a story about St. Francis staying up all night in prayer. The good saint, “lifting up his eyes and hands to heaven, and saying, with great devotion and fervor: ‘My God, my God’. And so saying and weeping continually, he abode even until morning, always repeating: ‘My God, my God,’ and nothing else.”
4. Domine non sum dignus.
The Domine non sum dignus prayer – Lord, I am not worthy – is a longstanding acknowledgement of one’s unworthiness to receive the body, blood, soul, and divinity of Jesus Christ in the Eucharist. While that is certainly its most proper context, it can be used during the week as we ask for grace or experience some unexpected mercy.
5. O Heart of Jesus, all for Thee.
This short petition to the Heart of Jesus certainly shares similar characteristics to the prayers uttered in the Litany to the Sacred Heart of Jesus. While this specific line is not mentioned, any of the lines within the litany could also serve as short invocations. For example:
Heart of Jesus, burning furnace of charity, have mercy on us.
Heart of Jesus, abode of justice and love, have mercy on us.
Heart of Jesus, full of goodness and love, have mercy on us.
Heart of Jesus, abyss of all virtues, have mercy on us.
Heart of Jesus, most worthy of all praise, have mercy on us.
Heart of Jesus, king and center of all hearts, have mercy on us.
Many find the imagery surrounding the devotion to the Sacred Heart of Jesus to be stunning and certainly something on which it is worthy to mediate. These short invocations – though part of a larger devotion – can be an excellent way to incorporate the Sacred Heart into your day. Praying Most Sacred Heart of Jesus, have mercy on us is another excellent short invocation.
6. O God, have mercy on me, a sinner.
The short prayer is taken directly from the Holy Gospel according to St. Luke. The passage in pertinent part reads:
The Pharisee standing, prayed thus with himself: O God, I give thee thanks that I am not as the rest of men, extortioners, unjust, adulterers, as also is this publican. I fast twice in a week: I give tithes of all that I possess. And the publican, standing afar off, would not so much as lift up his eyes towards heaven; but struck his breast, saying: O God, be merciful to me a sinner.6
The phrase is also incorporated into the Jesus Prayer – Lord Jesus Christ, Son of God, have mercy on me, the sinner. While worthy of an entire independent conversation, the importance of the Jesus Prayer in Eastern Christianity is analogous to the prominence of the Hail Mary in the West. In Latin, this prayer reads – Domine Iesu Christe, Filius Dei, miserere me peccatorem.