My guess would be staying calm and making sure everything is handled properly. I remember hearing about a local contest winner who was so excited that he immediately started telling everyone before he had even completed the claim process. Nothing bad happened, but it made me think about how easy it would be to overlook important details when you're caught up in the excitement. If I ever found myself in that situation, I'd probably double-check the ticket, read all the instructions carefully, and make sure I understood the requirements before doing anything else. The prize isn't going anywhere, but mistakes can happen when people rush.