The basic form of lay apostolate is that of the individual Christian,
in their home, at work, in their social life etc

Each lay person must continue to "seek in the light of faith loftier motives of action in their family, professional, cultural, and social life and make them known to others when the occasion arises"

i.e. How can I help my home, my work place, my social center
become a better place, a more loving place, a more Christian place?

Step One:  prayer for home/work/social center
Step Two: good example
Step Three: words

c.f. saying attributed to St Francis of Assisi: "Wherever you go, preach the Gospel, and if necessary, use words" !

Jesus, please help all Christians "preach" by their good example!