I'm a lot more fastidious about washing lettuce, now. For some reason that really made an impression on me. I think I've got good habits as a general rule that will help me avoid most cross-contamination, but it's been interesting to read the threads and polls. Oh, and I pay more attention to how I load the fridge, now, too!
Weber Smokey Joe
18" Weber Kettle
22" Weber clone kettle
Curb-foundling char-broil gasser
WSM: Assembled! First cook: 8/25/06
Fanatical devotion to the Q