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Endorphins are another huge factor, and laughter—among other things—stimulates endorphin production.

laughter stimulates endorphins

So I seek out distractions that (can) make me laugh. Movies and games of any genre are good for that, but I think social games (vs. computer/video games) are better for the social interaction. I know people say videogames can be social, but the player's attention is primarily on the machine—not on the other players and their reactions. I get a bigger bang/kick out of playing hairy eyeball to hairy eyeball. YMMV.

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