"Happiness is health and a short memory," so says Audrey Hepburn.
If you ask Dolly Parton, the key to happiness is finding out who you really are, while Pablo Picasso recommends finding what you love and doing it for a living.
From great family and friends to living in the moment, helping others, self-sufficiency and appreciation... If you're on your own journey of happiness discovery we've gathered the top tips, quotes and motivational advice from authors, actresses, singers and other high-profile figures to help you along the way.
Although we may see these personalities as eternally joyful and constantly beaming, many of them mention their happiness being something they've had to work at.
Enjoy their words of wisdom and don't forget to smile:
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