Your body needs vitamin D to improve your mood. Called the "sunshine vitamin," your body absorbs it best through your skin, from as little as 10 minutes of natural sunlight. But the second best way to absorb vitamin D is through food: fatty fish (salmon, tuna, sardines, rainbow trout), fish oils (like cod liver oil), fortified milk, and egg yolks. Try this four-pack of smoked salmon in flavors of: citrus gravlax salmon with fresh dill and zested lemon rind; traditional Norwegian salmon, which is mild and cold-smoked; double-smoked salmon with a peaty Irish-whiskey like finish; and cracked pepper smoked salmon. Price: $60.