As we honor God the Father, God the Son and God the Holy Spirit today, may I suggest a practical exercise you can make to really bring the Holy Trinity into the fiber of your own lives. Take one minute at night before bed-time. In the first 20 seconds, think of something good and positive that happened to you that day, (maybe you made a new friend, received a nice letter, enjoyed a delicious dinner, etc) and thank God for that experience. In the second 20 seconds, think of something negative that happened to you that day, (a nasty comment you gave, ignoring someone, being involved in an argument, etc) and ask Jesus to forgive you. Then in the last 20 seconds, think of something that’s on your mind, or something you have to do or a person you have to face tomorrow, (maybe an interview, having to correct someone, a clash with a family member, etc) and ask the Holy Spirit to help you in that encounter. This way you are bringing in the three persons of the Holy Trinity in a very practical way to guide you and help you on a daily basis.
And remember never to be embarrassed to bless yourself in public. If you're with your family in a restaurant, you have the biggest test to see how faithful you are to your Catholic heritage - bless yourself and see the people around you admire you and probably complement you. In the name of the Father, and of the Son and of the Holy Spirit. Amen.