Here's how the Guardian Angels can help us and how to invoke them

Angels are strong and powerful. They have the important task of defending us from the dangers and above all from the temptations of the soul. This is why when we feel vulnerable to the malice's malice, we entrust ourselves to them.
When we are in danger, in the midst of nature or among men or animals, let's invoke them. When we travel. we invoke the help of the angels of those who are traveling with us. When we have to undergo surgery, we invoke the angels of the doctor, nurses or staff who assist us. When we go to mass we join the angel of the priest and of the other faithful. If we tell a story, we ask the angel of those who listen to us for help. If we have a friend who is far away and may need help because he is sick or in danger, send our guardian angel to heal and protect him, or simply to greet and bless him in our name.

Angels see the dangers, even if we ignore them. Not invoking them would be like leaving them aside and preventing their help, at least in part. How many blessings people lose because they don't believe in angels and don't invoke them! Angels fear nothing. The demons flee before them. In fact we must not forget that angels carry out the orders given by God. Therefore if sometimes something unpleasant happens to us we don't think: Where was my angel? Was he on vacation? God can allow many unpleasant things for our good and we must accept them because they decided by the will of God, although we are not given to understand the meaning of certain events. What we must think is that "everything contributes to the good of those who love God" (Rom 8:28). But Jesus says: "Ask and it will be given to you" and we will obtain many blessings if we ask them in faith.
Saint Faustina Kowalska, the messenger of the Lord of Mercy, recounts how God protected her in a precise situation: “As soon as I realized how dangerous it is to stay in the reception in our day, and this because of the revolutionary riots, and how much I hate evil people feed for convents, I went to talk to the Lord and asked him to arrange things so that no attacker dares to approach the door. And then I heard these words: "My daughter, from the moment you went to the porter's lodge, I put a cherub on the door to watch over her, don't worry". When I returned from the conversation I had with the Lord, I saw a white cloud and in it a cherub with folded arms. His gaze was flashing; I understood that the fire of God's love burned in that gaze ... "(Book IV, day 10-9-1937).

There is a song that says: I want to have a million friends. We could have millions of friends among angels.
Can you imagine the millions of angels in the church who adore Jesus the Eucharist? And all those around you, all the people you meet during the day, all those you see on television and all the people who live in your city or country? Why don't you start greeting the angels you meet on the street? Why don't you smile at them? You will see how you will improve and how much you will be a more lovable and pleasant person.
You will say that it is easy to forget angels when you are immersed in problems and with many worries to think about. Of course, but by continuing to present them and ask for their help, better solutions to problems can be found. Do not forget that angels are myriads and billions of billions (Ap 5, 11). Feeling supported by them will give you a lot of personal security.
Moreover, think that angels are unbeatable in generosity and will share many divine blessings with you. You can ask them for favors like: Bring a beautiful branch of celestial flowers to my mom right now. Give an affectionate kiss to this person. Help the doctor find out my brother's diagnosis. Assist this sick person at the time of the operation. Visit a friend of mine and tell him that I love him so much. And so many other things that angels will perform effectively.
Angels love us, smile at us, look after us. We are grateful to them. And when we have to please a person, we don't think if he deserves it or not, we think that his angel is good and let's do it for him. We try to help others without harboring resentments or grudges, and we often recite the prayer: Guardian Angel, sweet company, do not go away either at night or during the day, do not leave me alone, otherwise I would lose myself.