Sneak Preview: Admit It When It's Too Hard

Editor's note: This is a special excerpt from Jim Cramer's book, Jim Cramer's Mad Money: Watch TV, Get Rich. To order your copy and read all the rules, click here.

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5. Don't be afraid to say it's too hard: some things like restaurant same-store sales, are just too difficult to game. There are hundreds of different ways to make money in the market, but not everything is worth betting on. There are some metrics that are just too hard to predict, and that means you shouldn't try to invest based on them. ...