TJ Walker advises buying high-quality noise-canceling headphones as a simple investment in personal happiness. He argues these headphones let you tune out distracting or annoying people (e.g., loud or extreme opinions in public), thereby reducing opportunities for others to irritate you and supporting a habit of minimizing avoidable annoyances.
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One of the best investments you can ever make in yourself is buying a set of high quality noise canceling headphones. Now, I'm not pushing any brand, but I want you to get whatever the most expensive brand, highest quality brand, you can get it. Not because you have to listen to music. It's great to tune other people out. Now I'm all in favor of listening. Listen to family, friends, clients, colleagues. But there's so many opportunities in life when it's great to be able to tune out. You hear someone at the coffee shop giving extremist political views based on nonsense. Put the headphones on. One great habit to be in if you want to be a successful, happy human being is minimizing chances of other people to annoy you. Great headphones will do that.