Well, you should start out by determining if you'll "Bunker in" or "Bug out". Bunkering basically means turning your residence, or place of choice, into a fortress, and waiting for the panic to die down / the majority of the human bio mass to die out. Remember that living through the first few months will be the hardest.
This'll of course take some planning and stock piling, while bugging out only requires a pair of sturdy shoes or boots. But if you live in a city, count on the majority of people doing this, and it'll be a fight just to get to the good places first. In essence, you'll move as a carrion swarm, devouring everything in your path, as you and the other city folks, make your way into the countryside.