Improved breathing technique is something that I incorporate a great deal into sessions especially when dealing with anxiety and stress. There are many different breathing techniques one can use but the first thing to learn is abdominal breathing. Nine out of ten times if I ask a client to take a few deep breaths the shoulders will immediately rise and the abdomen, instead of filling outwards with air and releasing back on the out breath, will remain static. My favourite technique is alternate nostril breathing.
If you want to help bring stress levels down breathing is the perfect place to start.