After model…what then?

I’m working hard to dive in and understand the model and it’s purpose. I know the model is to show us that circumstances are neutral that our thoughts lead to feelings, feelings lead to actions and actions lead to results…I was explaining this to my husband and felt excited that I understood it and then it dawned on me…now what? 🙂 Once we realize the above how do we go about changing this. Could you please direct me to resources. Thank you!