Is as much about how we have lived than how we die. The main ingredient in dying well is having lived well.
Jeremy Taylor, in the 17th century, noted several components to the “good” death: hope, forgiveness, reconciliation, and a good Christian life. Our picture may include being at peace without discomfort, at home (natural setting) and surrounded by those we love.
An early version of the Anglican Prayer Book (1552) advises for the dying person to be in charity with the world, seeking forgiveness and offering it, thoughtfully disposing of wealth, making a will, and putting all affairs in order.
I hate the word closure because it always seems to be used without appreciation of the power of grief; grief is more like an open, rather than a closed book. Sense of completion and coalescing, rather than closure, is more important for those who are in the stages of grief and death.