Interesting responses. Thanks everyone!
What I would do is fairly simple.
I am lucky that I don't harbor resentments or have people that I need to track down and make amends or apologize too. Any fueds I have had with people, I am over. And anything that was worth apoligizing or making amends for, I have. I try to live everyday where I don't have any regrets. So if I have a regret or a redress that needs to me made, then I try to take care of it as quickly as possible. I don't like things hanging over my head.
I would make sure that my loved ones are taken care of, and that my wife will be taken care of (insurance, will, etc.).
I would go to confession. I'm not a "hardcore" Catholic or anything, and this is not my "safety line" or something I do for superstitions sake, it is just my way of making things right with my conception of God. It is my chance to, as Rich said, bring everything out on the table, talk about it, and come to a level of serenity with it.
Then I would make sure that I prayed/meditated every day; morning and night.
I might make it a point to call people or see certain people, but I wouldn't feel rushed or pressure to see everyone per say; like I said, I try to make every interaction I have with people meaningful so that if something ever does happen, I won't have regrets in that regards. Those kinds of regrets are impossible to really mend, so I don't want to go through that.
I have faced death before, and I will face it again. I don't fear it. But by doing all of the above, I would be able to face it free of anxiety or concerns over anything that might have been left undone.
Thanks again for replies. Keep em' coming; it really interests me to read about how people handle this...