56 Call an old friend out of the blue.
59 Always have dessert.
67 Sing!
70 Skinny-dip with friends.
79 Ignore the algorithm – listen to music outside your usual taste.
87 Learn how to breathe deeply: in through the nose, out through the mouth, making the exhale longer than the inhale.
94 Give compliments widely and freely.
100 For instant cheer, wear yellow. ?
