When a student or group of students are showing signs of getting off track, I simply go up to them and point to whichever poster is most fitting at that particular moment. In my opinion, simply telling them to reflect on the question which is located at the bottom of each poster is enough as a first means of behavior management intervention. No direct words or discussions are needed at this point and it allows the student a first chance to reflect on their behavior and make good choices. I must say that this strategy has worked well and I plan on continuing to use it as it's very non-threatening in nature and, in most cases, is enough to get students back on track.
As you can see by the posters below, each one has a specific purpose. The first one reminds students that their behavior may be negatively affecting their own learning. The second one implies that their behavior may be affecting the learning taking place around them and the third one asks them to reflect on whether or not they understand the expectations of a task or activity. If they do not, they need to ask for help.
If you would like to try this strategy out, please let me know and I would be more than happy to send you a copy of the 3 behavior self-check posters. If you do use them, let me know how they work out!