Avoid Krum.

You decide that Krum has probably had enough of making small talk with people, and especially wouldn't want to with one of his rivals in the Triwizard Tournament, so you leave him alone. It would be good for him, you reason, to have some quiet, without being interrupted by you.

You finish the essay you're writing, and decide you need some air, no matter how cold it is. You decide to visit Hagrid. You haven't talked to him yet about the First Task.