How do you prepare yourself for the death of a loved one?

My grandfather is quite ill and we don't know how long we will have him. It's strange seeing the end of someone's road in sight despite knowing it was absolutely inevitable. How do you cope? How do you prepare? I am steeling myself but it's hard for me to accept that someone who's been there my whole life, with good and bad times, won't be here. I've gone through this before, it's just been awhile. It's strange how short life seems looking back, doesn't it?
How do you prepare yourself for the death of a loved one?
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