How to deactivate your nervous system and feel positive about the world again

If you've found yourself stuck in a state of overwhelm and despair, you may feel it's a rational response to the state of the world. 

But experts say this feeling of chronic stress may actually be the result of a modern world continuously keeping our nervous systems in a state of overdrive. 

They also say that by making practical changes to your daily life, you can bring that system back into balance and regain a sense of hopefulness about your life and the future. So, how do you begin?