I know it is not only marnanu sati…
Basically I want to ask how a non practitioners can die mindfully.?
I understand that Vipassana followers can die mindfully due to there practice and there confidence on there virtues. For them conditions will ripe.
But can we tell to the person on deathbed to die mindfully. Can we help him. ?
You should not encourage death. You should only encourage mindfulness. In Theravāda Monasticism. Encouraging death even by words to make a peaceful death can lead to pārājika (defeat) if all the factors check out.
Your last thought influences where you go after death. So dying mindfully would be to meditate while dying or think of good deeds you’ve done. If someone is on their deathbed and you wanted to assist them, you would remind them of all the good merit they have done in their life and tell them to reflect on it, as to increase the chances of a positive rebirth.