The Windows and Android communities need to better understand why so many of us choose Apple, and the Apple community needs to better understand the large market of people who can’t or won’t.

On one basic level, what happened in 1969 with Wonder—and what happens every day with mp3 leaks—illuminates a very basic economic fact: Official markets will always lead to unsanctioned ones that feed off of the legit products—and often operate much more efficiently. Consumer desire has never automatically limited itself to strictly legal operations, particularly when fans can convince themselves (often rightly) that they’re doing no harm to the artists.

Copying a successful business plan is safe, and tons of companies are copying Groupon. The differentiating strategies of the more successful copycats are interesting, as is the arms-race and recursion of deal aggregators. I find it fascinating that people sign up for this stuff, because I find it wasteful. This is insane: “In just over two years, Groupon has accumulated 60 million subscribers, more than $1 billion in venture capital and $760 million in annual revenue to become the fastest-growing Web company ever. In December, it declined a $6 billion buyout offer from Google.”

It takes time and a lot of guts, but you'll save money. "It really works... but it works only if you truly are willing to walk away... and then refuse to bend when they try to put you off or change the terms. Stay civil, do not let any emotion in."