Simple carbs like white and sugary foods won't help after the initial gratification is over, instead making you crash and feel tired and irritable. But about 30 grams of complex carbs a day can produce enough seratonin in your body to help boost your mood, especially if eaten without a lot protein and fat. Lentils, brown rice, and potatoes at dinner are good ideas. Shredded wheat, popcorn, and pretzels can help throughout the day. These Skinny Pop Popcorn Cakes in the maple brown sugar flavor come in packages of two cakes each for portion control, and they have the crunch and touch of sweetness you crave in the winter, but with only 2 grams of sugar per serving plus a filling 2 grams of protein and 3 grams of fiber. Price: $3.49.