Investors spend most of their time looking for a great stock, anxious to buy one before others discover what they have. But equally important is knowing when to sell or when not to buy a stock. Here are a few red flags that stocks wave, no matter how good their numbers.

Dividends Are Very High. Stocks paying a dividend are a smart part of any portfolio. But when those dividends are much higher than average payments from companies in their industry, that's a problem waiting to happen. For example, if the average payment from the utility sector is 4% and the one you own is paying 10%, most likely the company's in trouble. Investors are selling the stock for a reason, making the dividend go ever higher (yield is: annual dividend/price ... the lower the price, the higher the yield). Sometimes the reasons for selling aren't known but become apparent after the quarterly earnings report. Or an announcement is made such as losing a contract that explains the downward pressure.

Yes, there is a secret ingredient to a successful stock. It's called great management. No company sustains superior growth without management that is focused and honest. That last part is crucial. Ask investors in Tyco, Enron, or the old MCI. As Warren Buffett once said, ""In looking for people to hire, look for three qualities: integrity, intelligence, and energy. And if they don't have the first, the other two will kill you. If you hire somebody without the first, you really want them to be dumb and lazy." You're hiring a company's management when you buy a stock. Here are two measures to help determine how well they're doing.

Shares of consulting giant Accenture (ACN) are trading sharply higher in after hours trading today following a strong fourth quarter earnings report.

As we noted in our earnings preview last night, analysts had been expecting to see Accenture post earnings of $0.63 per share, but actual earnings came in above expectations at $0.66.

If investing were only about numbers, then the math Ph.D.s would have all the money. But they don't. While numbers are very important and provide the majority of an investment decision, other elements come into play that are critical to any stock's success. They're hard to find sometimes but always worth the effort.

If you can discover these elements in a stock and great numbers, too, you've got all the odds for investing success in your favor.

The number one, most important piece of the investing puzzle is management. Management is everything. It's where all ideas begin and execution of them is implemented. Management can turn around a bad company and make it great. Management can take a good idea and turn it into a successful business.

General Motors Co. Chairman Ed Whitacre told reporters Tuesday he doesn't intend to remain in the chief executive post indefinitely.

The search for a new CEO has been underway for about a week, but so far there are no candidates, Whitacre said. He's open to candidates of all backgrounds, whether a company insider or a seasoned executive from elsewhere, with or without auto industry experience. But he'd also like the next CEO to be a inspirational and motivating leader who can restore GM to former icon status.

If you are not reading the commentary we receive then you are missing some gems. One of our regulars reminded me of something "my pal Warren" said: "... find companies which can be run by idiots because sooner or later an idiot will be running it."

In Buffett's case he can actually call them up and talk to them. In many cases, he could probably get them to resign. For most of us, all we know is basic things like how's the stock price or has the idiot been indicted?

During the private equity boom years, one of the most common criticisms of the private equity kingpins went like this: "All they do is buy companies at a discount, leverage up the balance sheet, and use the cash flow to pay off the debt -- extracting millions in fees in the process."

Well now that access to cheap, covenant-lite debt has dried up, buyout shops are turning to the other option for making money: operational improvements. A new white paper released by Grant Thornton and the Association for Corporate Growth -- admittedly a private equity trade group -- found that 42% of private equity firms are devoting between 51% and 75% of their time on the management of companies they already control.

The Associated Press reports that many publicly traded U.S. companies are cutting back on the amount of forecasting they're willing to do, leaving investors in the dark with little in the way of "forward-looking statements" to rely on.

It's easy to understand why: The tough economy has given many companies trouble in meeting their forecasts, and hell hath no fury like a stockholder or Wall Street analyst whose investment hasn't performed as well as management had predicted.

According to the AP, "A third of the 600 companies responding to a recent survey by the National Investor Relations Institute said their policies about financial guidance had changed. Most eliminated or limited the amount of guidance they provide about earnings and revenue."