I would change the way I spent my last few days with my grandpa. I was 9 years old, I didn't know lung cancer was going to kill him. I thought he would get better and everything would be okay. So I, of course, did not spend those last few days as meaningfully as I could have. Of course, there wasn't that much I could do since he was confined to a hospital bed. Even now, almost 10 years later, his death still hurts.
I like this quote from Walter Anderson, "bad things do happen; how I respond to them defines my character and the quality of my life. I can choose to sit in sadness, immobilized by the gravity of my loss, or I can choose rise from the pain and treasure the most precious gift I have - life itself."
Of course, I can tell myself stuff like that every day, but it doesn't make the fact that I'll never see my grandpa again any easier.