Could Sudoku be a balm for anxious people? A new study suggests that intellectually demanding challenges like crossword puzzles or chess may be more successful at keeping worry-prone people from worrying than supposedly relaxing pastimes like watching TV or shopping.

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Excerpt: Soon, everywhere you turn, someone will hold up a platter and offer you something they swear is the most delicious treat ever. But what if you have dietary limitations like diabetes, celiac disease, kidney disease or food allergies?

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