Want to be happy? Before bed, do this simple psychological exercise.

On the occasion of the upcoming release of her book "Happy Birthday! How to Take Care of Your Own Happiness," Dr. Ewa Woydyłło revealed a simple psychological exercise worth practicing before bed to achieve greater life satisfaction. It revolves around pride.

"I have a recipe for happiness. It really works. Every day, not in the morning, but in the evening, before you turn out the light, you should remind yourself of what you did that day, what you're proud of. Of course, you can do several things, but one is enough," Dr. Ewa Woydyłło told PAP Life.

She laments that the words "proud" aren't often used because "humanity is supposed to be humility and misfortune." Explaining the concept of pride, the psychologist refers to childhood.

"Remember when you were two years old. You took a triangular block, tried unsuccessfully to push it into the square or circle-shaped holes, until you hit a triangle and the block fell into the toy. Remember how thrilled you were with your discovery? You squealed with triumph, clapped your hands, and called on the family to applaud you. And no one needs to teach you that. You feel proud when you succeed, when you do something you care about," says Woydyłło.

Her latest book, "Happy Birthday! How to Take Care of Your Own Happiness," will be released on July 30th. In it, she writes about, among other things, the "ugly things" that block us from achieving happiness. These include resentment, insults, blaming, shaming, criticizing, prying, lecturing, complaining, secrets, and more.

"Insulting is a strategy many people use when they're in a dispute, in a controversy, or when they're angry with someone. Why is it so harmful? Because insulting keeps us angry. We're not solving the problem, we're just staying there," he explained in an interview with PAP Life.