[header] How to become positive, happy and optimistic [title] Choose a mantra. [step] A mantra helps you think more positively and cultivates a healthy mindset. When you're reciting your mantra, the part of your brain that makes self-judgmental thoughts turns off. 
You can use a mantra that you create for yourself, or you can choose a positive quote. Recite your mantra every morning or several times throughout the day.