You can use the CAB method to spot and fix negative thoughts. The CAB method helps you identify the negative underlying beliefs that you have and replace them with more positive counter-thoughts. An underlying belief is a belief you have about yourself, even if you don't realize it at first. They are important because they can affect how you interpret events in your life. You can use counter-thoughts to challenge negative underlying beliefs. By thinking about your situation, you can see that your negative beliefs don't match up with reality. Using counter-thoughts can help you improve your mood.