I hope you have been practicing the breathing exercise I posted this week. I also have another one for you. First, breathe in and count to 4 as you are breathing in. Make sure you have taken in all the breath you can when you are on 4. Then breathe out as you count to 4. Make sure you have emptied out your lungs on the 4 count. Now, that was easy. Do that 4 times in a row.
Next, do the very same thing, only count to 8. Then, exhale and count to 8 at the same time. You will now have to start measuring your breath as you inhale and exhale. Inhale and exhale your breath evenly and fill and empty your lungs as much as you can. Practice this 4 times.
Next, do the same exercise only this time, count to 12. This will be much harder. Practice this 4 times also. You will learn to control your breathing as you practice this exercise. Don't forget to breathe deeply using your diaphragm. This is an exercise that our choir practices and it is very effective.