When it comes to celebrating, a few good toasts are in store. But after the first round, it can get harder to keep track of all the calories you're quickly consuming ... especially because it's in liquid form. Just one glass of champagne (around 4.1 fl. oz.) has 91 calories. Instead of working your way up to an entire bottle of bubbly (which rings in at about 500 calories), Gibson suggests stepping on the breaks with Kombucha, Jun, or Water Kefir. "They're all tart, bubbly, and only mildly alcoholic celebratory drinks, with probiotics to boot."

If you're clinking margaritas instead of champagne flutes, you run the risk of drinking anywhere between 200 to upwards of 500 calories, depending on the size of drink. When you're out, skip the salt and stick to sipping tequila over ice with a splash of soda throughout the night; if you're having the festivities at home, swap pre-made margarita mix with diet limeade or fresh-squeezed citrus fruits.