Taught in school/college? Science, more specifically Chemistry. Otherwise, philosophy. Yeah huge overlap there. LOL
I had to answer this one. First I'd get as many guns as I could get my hands on without putting myself in much of harms way, then I find a remote location stocked with the most food possible and wait a month or so to let things settle down before I venture back out anywhere. The mountains are the best location IMO. Island = easily trapped and many other people would think to do that and would kill each other. But once I got to the mountains with guns and presumably a month's worth of food already there. I'd set up some sort of perimeter of razor wire in multiple layers and dig a trench between the two. I'm assuming these are slow zombies ala walking dead and NOT World War Z esque.
What is your dream car?