You can be a fan of almost anything—foods, wines, games, cameras, books, birds, rocks, plants, people, countries, cultures—and it will light your fire, Russell says in The Conquest of Happiness.
The more, the merrier.
"The more things a man is interested in, the more opportunities for happiness he has and the less he is at the mercy of fate, since if he loses one thing he can fall back upon another," Russell says.
"Life is too short to be interested in everything, but it is good to be interested in as many things as are necessary to fill our days."
Newspaperman George Allen said, "Have a variety of interests. These interests relax the mind and lessen tension on the nervous system. People with many interests live, not only longest, but happiest."