Keep fresh meat and meat juices away from other foods in the refrigerator, and when preparing. Never place cooked foods on the same platter that held fresh meats or poultry. This stops cross-contamination of bacteria.
Frozen meat should be completely thawed before you start cooking it. This is to ensure the centre (which is frozen the most) reaches the right internal temperature for cooking without overcooking the outside.
Some meat, such as steaks and joints of beef or lamb, can be served rare (not cooked in the middle) as long as the outside has been properly cooked. This will kill any bacteria that might be on the outside of the meat.