Suffering from the winter blues? Indulge in a little nostalgia, says a new study in the journal Emotion. Turns out giving into warm and fuzzy thoughts can actually heat up your body. That’s not all: There are three more reasons good it’s healthy to take a trip down memory lane, which we’ve rounded up for you.  Enjoy a slimmer holiday It might seem impossible given all those the frosted cookies…and that eggnog. But you can enjoy the holidays without adding to your waistline, by following this sage advice from Prevention’s fitness expert, Chris Freytag. Here, with just a little bit of planning, you’ll find out how to guiltlessly eat, drink, and be merry. The weird way to get ahead at work Lower your voice, suggest the findings of a PLoS One study, which concluded that lower-pitched voices are associated with stronger, more competent leaders. Not sure how to perfect your pitch? Check out these expert-backed tips on how to tweak speech. Feeling lonely? As if too much solitude wasn’t enough of a downer already, new research in Journal of Neurology, Neurosurgery & Psychiatry suggests that feelings of loneliness—not just being alone—may be a potential risk factor for dementia. Luckily, this is a problem that can be addressed. Here’s how. The food that defies your age Good news for those who love Italian food: A study published in the Journal of Nutrition found that dining the Mediterranean way seems to protect the body from exhaustion, muscle weakness, and other symptoms of aging. Curious what super foods Italians nosh on everyday? We’ve got you covered. (Check out How Italians Stay So Slim for even more Italian diet secrets.)