Everyone's gone? No chance of other survivors and I know it? Well I've never been one for suicide, but under those circumstances I would be seriously considering it. Barring that, get a small collection of animal companions (Immediately. It'll be too late otherwise), 'steal' two generators and hook it up to a house I'd stay at, take a crash course in animal care, take a crash course in gardening, start up a big garden, care for animal companions and garden, learn what I could about mechanical and chemical engineering and start trying to build my own generators (if nothing else it's something to do), raid the local sporting goods store and get a bow, a LOT of arrows, a hatchet, knife, fishing rod and lures...go hunting...