View this video for tips to prevent food poisoning
Always start preparing food by washing your hands with hot, soapy water for at least 20 seconds. Second, keep your raw, uncooked meats separate from vegetables etc. Consider using two different colored cutting boards to prevent cross-contamination. The juices from the raw meats can increase your risk of food poisoning if they come in contact with other foods. Once cooked to the right temperature, ensure that food is maintained at the correct temperature for it to be safe until eating. If kept at the room temperature for more than one hour in 90+degrees F or for more than two hours in <90 degrees F, the food is unsafe. Refrigerate your leftovers as soon as possible to prevent bacterial growth build up. When reheating food/left-overs ensure that you heat it to the right temperature.
Visit foodsafety.org for additional food safety tips.