Jesus died at about 3:00 in the afternoon and since then it has been known as the hour of mercy. Our archdiocese is encouraging each parish to ring its bells and pray the Chaplet of Divine Mercy at that hour, but these are activities that could easily be adapted for family use as well.
It’s likely your family isn’t all home together each day at 3:00, but you can still be united in prayer. Chances are you have some alarm you could set as a reminder each day and whoever is available (wherever they are) could pause for some kind of prayer. Whether it’s as simple as “Jesus, have mercy on our family,” or something a little more involved, the act of pausing in your day to recall Jesus’ mercy is a fruitful activity.