Lifestyle Designer Aileen Xu introduces a simple cognitive exercise that uses intentional list-making to rewire your brain for happiness.

One writer heads to the Swiss Alps for yodeling lessons—and discovers a sense of freedom (and some surprising health benefits) in the centuries-old singing tradition.

Much more difficult is learning to connect different types of stimuli or events, and predicting that one is linked to another. Such associative learning was most famously demonstrated when Ivan Pavlov ...