... general, no one stock should make up more than 10percent of your portfolio.) Although diversification limits yourupside gains, it also protects you in case one of your investments doesbadly.If ... get out of debt. That means paying off your credit cards,your car loans, and your mortgage (although you should talk to a taxadviser before doing the last of these). In addition, force yourself ... it the “30-30” plan: If your stock rises by more than 30percent, sell 30 percent of your position. By selling a portion of yourgains, you satisfy the twin emotions of fear and greed. (Legendary...