Dealing with stress, calming yourself
Using your heart rate to calm yourself
Using your heart rate to calm yourself, you will need to exhale longer or more vigorously than you inhale. Perfect for when the stress response hits.
Double inhales then exhale to release stress
Using your Physiological Sigh to calm yourself down, you will need to double inhale, long exhale for 3-4 times.
Other physiological tools
Be more alert
Using your heart rate to wake yourself up, you will need to inhale longer or more vigorously than you exhale.
How to increase your focus
Be highly motivated
To learn, you need to be alert. That alterness can come from different sources.