My understanding of stress is that stress is how we perceive the situation. So for one person, talking in front of people may be something exciting, while for another it can instill fear and anxiety and choke up any words that they say. The point I am trying to get to is that we create and feel what we think and feel - not the situation or the other person that we think is causing stress.
This means that stress can be controlled a number of ways, through muscle to mind techniques or mind to muscle techniques. For me, and what I teach to elite athletes, business professionals and students alike, is that probably the simplest stress management techniques is write under our nose.
When stressed, you are likely to take rapid and shallow breaths. By taking a couple of deep breaths from the belly, you reduce your carbon dioxide, increase your oxygen intake and counter the stress response. At the same time, by focusing on the breath, it is hard to focus on the other things around you that you think are causing you stress.
I write more about breathing exercises and other relaxation exercises here.
All the best