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Atmosphere: Light candles, use multiple lamps rather than one overhead light, and look for bulbs marked "warm white", or better yet, buy a house with a wood-burning fireplace.
Presence: Shut off the phone and other electronic devices and be "present" where you are.
Food: "Hygge is about being kind to yourself - giving yourself a treat." Sweets, cake, coffee and hot chocolate are all hygge. "Fancy" foods, such as foie gras, are not.
Clothing: Casual, black, scarves, bulky tops, layers and woolen socks. Works in Denmark and Nebraska in the winter. I'm not sure how to hygge on the beach.
Home: A hygge home should contain a cozy nook for reading, a fireplace, candles, things made out of wood, books, ceramics (like a favorite coffee mug), blankets, pillows, and vintage items.
Hygge activities: Board games, TV night, croquet, pot-luck meals - anything where you spend time with friends.
In short, the secret to happiness is chocolate cake, coffee (with cream), a board game and good friends, followed by a good book in front of a fireplace. It's about savoring each of those items and being grateful. I figured that out years ago!
The book is authored by the CEO of the Happiness Research Project. I guess getting paid to research what makes people happy, not to mention a major book deal, is pretty hygge.