Calico Spanish brings up suggestions from teachers from twitter on how to manage classrooms. These include keeping the classroom structured as well as keep it moving, so that student's don't have the opportunity to get distracted. When it does happen, though, it's important to maintain consistent discipline.
Keeping students motivated to stay in the target language is difficult, as the default native language creeps up on them. The idea stated with this blog suggests rewarding the class with a prize if they stick with the target language for the majority of the time. I could see this being modified as well, to be a weekly or monthly challenge or possibly competing with the other classrooms of the same level.
While not exclusively about the world languages classroom, The First Days of School is a must have for teachers, new and old, who want to have effective classroom management skills. There are tips for grading, coming up with a discipline plan, seating arrangements, and how to invite students to learn.
"This video discusses 10 tips for keeping the classroom in line. Keeping and managing who might be the more troublesome students and making them on your side by asking them to do jobs, I believe, is one of the keys to having a calm classroom. If students are still acting out, the ability to keep close to them is also key.
There are differences between a core subject classroom and a foreign languages one. Mainly, the confusion that may cause when using the target language. There are tips here for keeping the students in check, including the use of visual cues and the need for scaffolding.