The fount of holy water that we have at the entrance of the Church, the holy water we use to bless ourselves or to bless the family and their belongings, is a way to renew our baptism and the promises we made in it. Remember that our baptismal promises (made the day we were baptized) include giving up Satan and rejecting sin, it is very good to remember when we use holy water.
It is good to know that this water, through the priest, is blessed by God under the baptism of Christ and you can use it to bless yourself, bless your home, bless your family, bless your work space, bless your vehicle and bless the sick people. How to use holy water? A small prayer can be made when using the holy water, such as the sign of the cross: "In the name of the Father and of the Son and of the Holy Spirit." You can also pray an Our Father and a Hail Mary