Wash your hands thoroughly after using the bathroom and before preparing or eating food, and always wash them after you use the bathroom or change diapers - it's the best way to prevent infection with any bacteria.
Cook meats thoroughly at a temperature of at least 160 degrees F°/70° degrees C (use a thermometer to test the meat if you're not sure).
Do not drink raw milk, unpasteurized dairy products, and unpasteurized juices (like fresh apple cider).
When traveling abroad to countries that may have unsafe drinking water, don't drink tap water or get ice in your drinks. Also, avoid raw fruits and vegetables, except those with skin that you can peel yourself.
Avoid swallowing water when swimming or playing in lakes, ponds, streams or swimming pools.
Keep your cooler cold - pack lots of ice and/or freezer packs, so when the old ice starts to melt, you can replace it with new ones. Also - keep your drinks in a separate cooler from the one that contains the raw meat, and always keep the cooler out of the hot sun.
When you take foods off the grill, put them on a different plate from the one you originally had them on - so they don't soak up the raw meat juices - unless you have washed it with hot soap and water. Never let cooked foods sit outside for more than one hour.
Summer is prime time for food-borne illness, so Dr. Cynara Coomer offers some quick tips on how to avoid it