Here's why they're so "crucial," and how to incorporate them into your daily life, according to Martela.
"It would be more accurate to say that Finland is the country that has the least unhappy people in the world," Martela tells CNBC Make It.
For six years and counting, Finland has been the happiest country in the world .
"When you help someone, when you [have a] positive impact on others, your own happiness and sense of meaningfulness increases," says Martela.
"[A] strong sense of purpose also makes it easier to tolerate bad conditions," Martela says.
Persons:
Frank Martela, Martela, Suneel Gupta
Organizations:
CNBC, Ohio State University, Harvard University
Locations:
Finnish, Finland