Wake up everyday choosing a positive attitude: "Today is going to be a great day!"
Strengthen your brains ability to create positve thinking. Think positive phrases and words so you connect them to many situations: ie: fabulous, delightful, superb, gracious, fantastic...
Savor good moments, take notice of something funny and compliment a person on something.
Listen to positive music or read something uplifting, funny or maybe a heartwarming success story.
Go to bed thinking of something that makes you grateful.