Focus on your breath
To get the most out of a yoga class, you should connect your breath to your movements. Many instructors will ask you to use your "ujjayi breath," which means that you should breathe through your nose with your throat slightly closed, so that your breath is audible, like a whisper. This will help increase your concentration, and flow more seamlessly from one pose to another as you inhale and exhale. Try to match the volume and rhythm of others in the class, and breathe deep into your belly for best results.