What would you do during a zombie invasion?

Hiding is the only logical answer. It is only a question of "where." The best places would be aras of extreme low temperatures, mostly areas where permafrost is present. Most will say that islands are the best choices and so are boats- they are wrong. Islands will still be vulnesble to attack because the living dead are in no need of air, as long as they have an intact brain they will hunt for food. And boats are just as bad because it could be years before the plague ends and you most likely will run out of supplies or fuel.