Try starting with some breathing exercises. Most of us breathe very badly, not making the best use of our breath. There are three levels of breathing ~
~ Clavicular breathing, - a slow shallow breath using only the top of the lungs. This type of breathing leads to low levels of energy, small intake of oxygen and little CO2 being breathed out. Many clavicular breathers breathe through their mouths.
~ Intercostal breathing, - using more lung capacity and causing the ribcage to expand.
~ Abdominal breathing, - the breathing of babies. Pushing out the lower abdomen so that air is drawn in to completely fill the whole of the lungs. On breathing in, the abdomen is pushed inwards towards the spine and the diaphragm moves up.
~Breathing through the mouth should be avoided. The nose is a filter for pollutants. A breathing exercise always starts on a full out breath. Much emphasis is on the out breath with breathing exercises. A good out breath in a stressful situation will take you far.
Here is a breathing exercise known as "Bee Breath". It is a good exercise for getting children started, and for people with breathing problems.
Sit in a comfy position with your spine straight. Tuck in your chin (to straighten your throat). Rest the back of your hands on your knees and relax your shoulders.
Breathe out slowly and completely. Breath in.
As you breath out, hum the air out like a bee until you have no breath left. (Good coven activity :P)
One is enough, but do continue of you're having fun. The correct term for this exercise is "Brahmari".