I think it's time to familiarize ourselves with the best/proper ways of handling food and storing it. Sometimes those lapses in food handling may "only" result in an upset stomache of fairly short duration, and we don't assume, wrongly in many cases, that the way we shopped, prepared or held the food in our homes has anything to do with that tummy ache. And sometimes those lapses in handling can result in some truly serious illness.
As a start, you can head here http://www.fsis.usda.gov/factsheets/Basics_for_Handling_Food_Safely/index.asp for some tips we all should know. There are also links there to other articles that contain info we should know, such as At-Risk Populations, Meat Preparation, Poultry Preparation, Egg Products Preparation, Seasonal Food Safety, Appliances & Thermometers, Foodborne Illness & Disease,
There's also some important information to know at http://www.foodsafety.gov/
With summer soon to be here, try this site for some important information on barbecue safety http://www.fsis.usda.gov/Fact_Sheets/Barbecue_Food_Safety/index.asp
And you might want to apply some of what you read above to places where you purchase ready made food, such as take home food stores and restaurants. How are they storing and preparing the food you are going to be eating?
Better safe than sorry.