Cramer's 'Mad Money' Recap: Avoid Common Money-Losing Mistakes (Final)

NEW YORK (TheStreet) -- "Tonight's show is devoted to avoiding common mistakes and recognizing misinformation when you see it," Jim Cramer told his "Mad Money" TV show viewers. He said the best way to make money in the markets is to invest with discipline, using his five new rules for navigating confusing, and sometimes infuriating, markets.

Cramer's first rule, don't dig in your heels when you're wrong. Citing the economist John Maynard Keynes, "when the facts change, I change my mind," Cramer reminded viewers. He said it's natural to not want to admit you're wrong, but it's also a quick and easy way to lose money.

Cramer recounted how in March of 2009, when the Dow Jones Industrial Average had fallen to just 6,500, he made the bold call that the downside was minimal. That call, he said, spurned tons of hate mail from those investors who had succumbed to the theory that all the Dow could do is plummet lower, and lower and lower.

But Cramer said he had done his homework by analyzing where he felt every stock in the venerable industrial average should be in a doomsday scenario. This included valuing all of the banks at zero. From there he determined that the industrials just couldn't possibly fall much lower than where they already were. A month later, the Dow Jones was 1,500 points higher.

The notion of changing one's mind is a tough one to come to terms with, said Cramer. It's like expecting your favorite sports team to stage a comeback an hour after the game has ended. The facts are always changing in business, he noted, and at some point, investors need to acknowledge that the game is over and they were wrong.