I really don't think anybody really knows what they would do if they found out one day that without a doubt they only have 24 hours to live. I don't think it's something that you can predict. This is probably the closest thing to how I would be(or would want want to be), but still.
My first feeling would probably be extreme heartache. Just the fact that I know I won't see them for a very long time would be horrible enough, but imagining how much grief they would go through would be devastating for me. To be honest, I don't even know if I would want to go anywhere special like Disney World, Sea World, Six Flags or somewhere else; I really think the shock and grief would be too overwhelming for me and my family to enjoy anything. But since I know know my family, they'd take me anyway, so I'd go and try my best to enjoy what's left of my time with them. After that, I'd stay with my family at home and share all of the memories we've had together and cherish every minute. After that we'd take plenty of pictures.
I know the question "Why me?" would arise eventually, but if I were really to die that day, I could say with that I had a good life and enjoyed it, even if it was cut short. The good moments in my life have definitely outwheighed the bad. I think the last thing I would do is is hug them, and tell them that I love them very much and I can't wait to see them all again.
...This makes me feel depressed. XD