To test for demand, just ask yourself, "Do a lot of people care about this?" If the answer is yes, then ask yourself, "Are people willing to pay a lo… - Ramit Sethi

Frugality, quite simply, is about choosing the things you love enough to spend extravagantly on — and then cutting costs mercilessly on the things you don't love.

Because I don't understand or care about sports, last Super Bowl Sunday I decided to go on a wing crawl. It's like a pub crawl, but with wings. I quickly realized that the most interesting part of eating wings with friends is seeing how much meat they leave on the bone. Some people leave half the chicken and move on to the next wing. These people are worthless, and I quickly distance myself from them.

All our lives, we've been taught to defer to experts: teachers, doctors, and investment "professionals." But ultimately, expertise is about results. You can have the fanciest degrees from the fanciest schools, but if you can't perform what you were hired to do, your expertise is meaningless.