Fools were out and about this week in an investing world jampacked with actions and ideas. Here are three articles you might find useful as you decide how to invest your money.

Rising Star Sell: Lightening the Nam Tai Position
Fool analyst Jim Mueller brings investors along as he takes steps to correct a stock-buying mistake he made in his Rising Stars portfolio. Every investor makes mistakes, and it only makes Foolish sense to admit them, correct them, and learn from them.

Jim's mistake involved a second round of purchasing Nam Tai Electronics (NYSE: NTE) shares after the price dropped. As it turned out, "purchasing additional shares at a 'better' price actually increased the portfolio's risk level," Jim wrote in the article laying out his plans to sell some of the Nam Tai shares in his "Messed-Up Expectations" portfolio.

Read the article to learn from Jim's misstep.

Should You Buy Pandora Today?
Fool contributor Anders Bylund thinks Pandora (NYSE: P) is a "serious threat" to Apple's (Nasdaq: AAPL) iTunes and Sirius XM Radio (Nasdaq: SIRI). If that sounds like something you want to get in on, be sure to take note that Anders is not willing to buy Pandora shares at just any price.

"Though revenue is growing like gangbusters, costs are tagging along as well and the company hasn't figured out how to turn a profit," Anders wrote. "I'll take a serious look at Pandora shares when the company figures out the advertising game. … Don't invest a penny here until you can see and understand how the company plans to make money. "

See the article to get all of Anders' insight on the newly public company and check out the lively conversation taking place in the comments section on that page.

The Remarkable True Story of the Company That Doesn't Lay Off Its Employees Managing Editor Brian Richards nicely ties the situation at Lincoln Electric (Nasdaq: LECO) -- the company hasn't laid off anyone for lack of work for at least 60 years -- to some Foolish investing wisdom: "If this seems like a quaint anomaly of a Rust Belt firm doing old-fashioned things, consider the investment philosophy of Fool co-founder and Stock Advisor co-advisor Tom Gardner: 'The most important factor I look for in an investment is how a company takes care of its employees and what sort of culture it is developing.' "

Check out the article to learn more about how Lincoln uses open-door management, piecework, merit-based profit sharing, and guaranteed continuous employment. There's more to learn from Brian and Tom, as well as from Frank Koller, author of Spark: How Old-Fashioned Values Drive a Twenty-First-Century Corporation.