Editor's note: This is a special sneak preview of Jim Cramer's just-released book,

Jim Cramer's Stay Mad for Life: Get Rich, Stay Rich (Make Your Kids Even Richer)

. Look for more sneak previews every day, and get your free copy with your annual subscription to Action Alerts PLUS; click here for details. Catch Cramer in person at his last book signing event: Saturday, Jan. 12, at 1 p.m. in Westbury, Long Island's Costco. Missed the first sneak previews? Read the book intro and the rules of getting and staying rich: Rule 1, Rule 2, Rule 3, Rule 4 and Rule 5. Know what pros do right and amateurs do wrong: Part 1, Part 2, Part 3, Part 4 and Part 5. Learn the five mini-bull markets that will stampede for years, starting with aerospace and defense, agriculture, oil and oil service, minerals and mining and infrastructure.

5. Piggybacking can be a winning strategy if you remember to stay on the pig!

If you like an idea suggested by a great stock-picker and you buy a stock, don't jettison it as long as the champion of the stock still loves it.

In the past few years, I have come to love a website that identifies stocks owned by great investors and lets you cross- reference those stocks with those of other holders:

www.stockpickr.com. It also allows you to be involved in a community of investors who have posted their own portfolios and given reasons to own the stocks. I find this an incredibly worthwhile way to get started finding a stock.

Not long ago I learned that Rich Pzena, perhaps the greatest value manager of our time, had purchased a big stake in American Physicians Capital. I reached out to Rich -- he's an old friend -- to ask him the story. He pointed me to the company's website, which showed that this malpractice insurance company was beginning to benefit from a tide that had turned against the plaintiffs in lawsuits against doctors. He told me to monitor those lawsuit verdicts through the company's website and to follow his holdings on the stock to know if anything needed to be done, but that he was in it for as long as his thesis played out. Tracking Rich and others like him is what Stockpickr.com was made for.

The stock soon moved up 4 points and I figured, why wait to see if Pzena still owned it when I could take the terrific gain? Not long after I sold, I saw that Pzena had increased his position and become the largest holder of the stock. I didn't want to buy it back -- I should have, but I was too proud (another lesson learned, but something you shouldn't have a problem with; I was hung up on buying back because every move I make is public).

Over the next year I watched it go up and up until it had doubled from where Rich had bought it. I could have piggybacked all the way, but instead I got off

despite my desire to mimic this great investor

.

Cramer on Stocks vs. Mutual Funds

var config = new Array(); config<BRACKET>"videoId"</BRACKET> = 1322221281; config<BRACKET>"playerTag"</BRACKET> = "TSCM Embedded Video Player"; config<BRACKET>"autoStart"</BRACKET> = false; config<BRACKET>"preloadBackColor"</BRACKET> = "#FFFFFF"; config<BRACKET>"useOverlayMenu"</BRACKET> = "false"; config<BRACKET>"width"</BRACKET> = 265; config<BRACKET>"height"</BRACKET> = 255; config<BRACKET>"playerId"</BRACKET> = 1243645856; createExperience(config, 8);

If you are in a stock because some great manager likes it and you monitor the story and it doesn't change and the manager doesn't sell off some of the holdings, why sell? While a gain is never "costly," it glares at me that I bought it for one reason, the piggyback, after he had done

all the homework for me

, and I acted, with my selling, as if I knew more than he did. I didn't! My belief was in him and his abilities. He never wavered. I did, and I left an outsize gain for him and his investors without me. Stay on the bull that brought you to the party.

Editor's note: This is a special sneak preview of Jim Cramer's just-released book,

Jim Cramer's Stay Mad for Life: Get Rich, Stay Rich (Make Your Kids Even Richer)

. Look for more sneak previews every day, and get your free copy with your annual subscription to Action Alerts PLUS; click here for details. Catch Cramer in person to get it signed: Wednesday, Dec. 12, at 7 p.m. in Bridgewater, N.J.'s Borders; and Saturday, Jan. 12, at 1 p.m. in Westbury, Long Island's Costco. Missed the first sneak previews? Read the book intro and the rules of getting and staying rich: Rule 1, Rule 2, Rule 3 and Rule 4.

Please note that due to factors including low market capitalization and/or insufficient public float, we consider American Physicians Capital to be a small-cap stock. You should be aware that such stocks are subject to more risk than stocks of larger companies, including greater volatility, lower liquidity and less publicly available information, and that postings such as this one can have an effect on their stock prices.

From Jim Cramer's Stay Mad for Life by James J. Cramer and Cliff Mason. Copyright

2007 by Jim Cramer. Reprinted by permission of Simon & Schuster, Inc.

At the time of publication, Cramer had no positions in any of the stocks mentioned in this column.

Jim Cramer is a director and co-founder of TheStreet.com. He contributes daily market commentary for TheStreet.com's sites and serves as an adviser to the company's CEO. Outside contributing columnists for TheStreet.com and RealMoney.com, including Cramer, may, from time to time, write about stocks in which they have a position. In such cases, appropriate disclosure is made. To see his personal portfolio and find out what trades Cramer will make before he makes them, sign up for

Action Alerts PLUS. Watch Cramer on "Mad Money" weeknights on CNBC. To preorder Cramer's newest book -- "Jim Cramer's Stay Mad for Life: Get Rich, Stay Rich (Make Your Kids Even Richer)," due in stores Dec. 4 -- on Amazon,

click here. Click

here to order "Mad Money: Watch TV, Get Rich," click

here to order "Real Money: Sane Investing in an Insane World," click

here to get "You Got Screwed!" and click

here for Cramer's autobiography, "Confessions of a Street Addict." While he cannot provide personalized investment advice or recommendations, he appreciates your feedback and invites you to send comments by

clicking here.

TheStreet.com has a revenue-sharing relationship with Amazon.com under which it receives a portion of the revenue from Amazon.com purchases by customers directed there from TheStreet.com.