I thought this answer, from one woman, was beautiful:
For months, I dreamed every night, just before sunrise, that I'd hear him getting ready in the morning. Showering, brushing teeth, shaving, opening drawers.....just typical sounds of early morning. Sounds I never paid much attention to, until they were gone.
I wish it wasn't like this, the not paying attention to what you have while you have it- but it is.