stress techniques

Which three relaxing techniques can help relieve the stress caused from helping customers in a call center? 3?
1) Take calls only from customers that are knowledgeable about computers.
2) Take frequent gaming breaks.
3) Go for a quick walk.
4) Listen to soothing sounds.
5 ) Practice relaxed breathing.
6 ) Take a long lunch hour to reduce fatigue.
3 4 5
One of the breathing techniques for stress, anxiety and panic from www.mindpal.co.uk