and noone else were alive, what would you do?
I would go around and gather up all the canned foods I could, start a farm, gather all the guns I could, move into the sweetest mansion, watch dvd's using generators, make ice cause gotta have ice, have lots of dogs for companionship and protection, fuck sheep, etc.
The last one, just wanted to make sure you were paying attention.
I'd look for other survivors. Did you see that will smith movie where he thought he was all alone? Something like that.
I'd fish, hunt, learn to fly a plane, have a lot of boats. Imagine having every motorcycle, boat, yacht, airplane at your disposal.