There is no problem to which the response is not the practice of one of the three theological virtues:
1814. Faith is the theological virtue by which we believe in God and believe all that he has said and revealed to us, and that Holy Church proposes for our belief, because he is truth itself.
1817. Hope is the theological virtue by which we desire the kingdom of heaven and eternal life as our happiness, placing our trust in Christ's promises and relying not on our own strength, but on the help of the grace of the Holy Spirit.
1822. Charity is the theological virtue by which we love God above all things for his own sake, and our neighbour as ourselves for the love of God.
(Catechism of the Catholic Church)
Of course, if one is not Christian, one can adapt the principles of these to one's own conception of God.
The response might be worded as follows:
- I trust in God's providence [giving me everything I need to master each situation]
- I trust in God's direction [the right thing to do]
- I have confidence in a good future, with God's grace ['the power to carry that out']
- I serve [= love] God by being helpful to others
When upset, worried, anxious, depressed, bored, apathetic, angry, or anything else other than joyfully engaged in serving God, the above statements, if affirmed persistently enough, will bring about the requisite shift in state of mind.