Someone laughed. It might have been my sister, dad, grandmother, or one of the dozen friends and family members arrayed around that bed in my parents' room. Before we cried, said goodbye, and fanned out in separate cars to begin our private journeys of grief, something was said, at the moment she died, in a summer evening's half-light. And somebody laughed. Maybe it seems strange, but I like to remember it.

...

Psychologists call this drawn out period "anticipatory grief." Anticipating a loved one's death is considered normal and healthy, but realistically, the only way to prepare for a death is to imagine it. I could not stop imagining it. I spent a year and a half writing my mother a goodbye letter in my head, where, in the private theater of my thoughts, she died a hundred times. In buses and movie theaters, on Connecticut Avenue and 5th Avenue, on crosswalks and sidewalks, on the DC metro and New York subway, I lost her, again and again. To suffer a loved one's long death is not to experience a single traumatic blow, but to suffer a thousand little deaths, tiny pinpricks, each a shot of grief you hope will inoculate against the real thing.