Specific ways/practices to help die with equanimity, (less "self") and perhaps even awakening at death-time?

In general all Buddhist practice seems to help with the concerns mentioned in the Title. Equanimity helps with all unwanted, changing conditions (from minor challenges to "aging, sickness and death". Lessening (or even losing) the sense of "self" also seems powerful each day and especially on the last one. If anyone, especially anyone currently preparing for the eventual laying down of the body has: insights, dharma, experience (thus far)...please reply.