In the short term, your house will be your castle. You should already posses supplies of armaments, food, medicines and drinkable water. You may suffer from unpleasant BO and lack of air conditioning for a while, but you will not die.
In the unlikely event that order is not restored and supplies do not begin arriving from outside, your survival will depend on your ability to defend your "temporary" stores of food and water from those whose stores have expired. This will remove a great deal of the population, either through starvation or through violent conflict. These will be very hard times to live through. Having your own supplies will enable you to remain inconspicuous by not venturing outside to find undefended supplies. Game animal stocks may become partially depleted during this time as the great bulk of the human population readjusts to the greatly reduced food supply.
After this initial period of chaos, your survival will depend on your ability to produce and protect your own supplies of food. If you are still in a city at this point, you should venture out into the countryside. Cities have little arabale land and few edible game animals. If you are near the seashore, the collapse of civilization will eventually lead to replenishment of fish stocks, so subsistence fishing may eventually prove worthwhile.
Eventually groups of food producers will group together for mutual protection against raiders that have survived the chaos. Surpluses of food will allow for non-food professions, which will include government and full time defenders of property. Eventually civilization will return. In time, the idea of armed raiders attacking food growers will become a distant memory, and the full-time defenders of civilization will become traffic police.
Living far from dense population centers and near agricultural centers will prove to be beneficial during the collapse of civilization. Although lack of industrial fertilizer production will reduce agricultural output, the culling of the city populations will balance things out.
. Oh Yeah! I would have a knife or twenty as well. Question? What does Alpo really taste like. It can't be as bad as egg omelet and ham MRE 
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