According to Catholicism, what are concrete and practical ways by which Christians can be filled (and stay filled) with the Holy Spirit?

The concept of "being filled" with the Holy Spirit is mentioned multiple times in the New Testament, and according to the book of Acts it appears to have been a crucial aspect of the early Christian life. According to **Catholicism**: - What does it mean to be "filled" with the Holy Spirit? - What are concrete and practical ways by which Christians can be filled (and stay filled) with the Holy Spirit? _______ For those interested in the Protestant perspective: https://christianity.stackexchange.com/q/86595/50422