When I was in my mid-20s and going through a bad break up, I got really down. Like really down. For several months. During that period, I did probably the most mustachian and least mustachian things of my life.
The break up was in the fall. I had been a smoker for 7 years or so, keeping it more or less in check but after the break up, my smoking increased and had gotten to more than half a pack a day and rising. On New Year's, I decided to quit. I was already miserable and I couldn't imagine being more miserable so it seemed like a good time to quit. About 3 days into the quit, I'd had terrible insomnia and was extra cranky. I realized that I never wanted to feel that bad again. And that if I smoked again, I would have to quit again and so I would feel that bad again. So I really committed to the quit. And I have stayed quit since. So mustachian.
But some months later, by spring, I was still feeling really down. I felt I needed to do *something* for myself, to start feeling better. So I learned transcendental meditation. Which is truly not anti-mustachian in itself. But the pricetag was. I believe it was in the range of $1300. Which went on my credit card. And was really more than I could afford, given my circumstances at the time.
Eventually, I did start feeling better. The meditation certainly didn't hurt (not sure how much it helped). But man was that ever overpriced!!! I got 2 - 3 sessions with a teacher who assigned me my own mantra and told me how it's done (basically just clearing your mind and repeating the mantra, twice a day, 20 mins each time). So quite anti-mustachian.