I have been significantly impacted by a secularist with a high respect for Christ but a low regard for miracles.
I have a high regard for miracles but also a big mouth.
God has taught me to control my tongue in the controversy over science partly through memento mori.
These apparently are little reminders of the inevitability of death, like the skulls medieval authors used to put on their desks as they contemplated their decisions and words.
It is better to go to a house of mourning
than to go to a house of feasting,
for death is the destiny of everyone;
the living should take this to heart.
Nowadays we have the daily news, but that is an interesting idea of having a personal memento that speaks specifically to you about how to keep mortality in mind.