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.

Truth in Mobile Advertising? Not Here.
Fool contributor Anders Bylund had a need to consider speed after seeing the marketing campaign Deutsche Telekom (NYSE: DT) subsidiary T-Mobile is using to "smear dirt all over the quality of AT&T's (NYSE: T) 3G network" and taunt Apple (Nasdaq: AAPL) for tying its iPhone to the network.

"T-Mobile is using the term as a shorthand for 'faster than 3G,' but that's not what 4G is supposed to mean," Anders wrote, cluing in readers to specific standards set by the International Telecommunications Union and looking at how WiMAX and LTE measure up.

Check out the article and log your comments on this issue. Do you agree with Anders that "the very concept of 'truth in advertising' sounds so quaintly antiquated these days, but there is too much wrong here to stick your head in the sand"?

Have These Stocks Risen Too Far?
An increase in the price of the stocks you own is good because it means you can sell the shares for more money. However, the rise in a stock's price doesn't tell you whether the company is strong and worth your investment dollars over the long term.

Fool editor and writer Dan Caplinger helps investors think about why the market might be upbeat on a stock even if the fundamentals don't justify it. Perhaps the elections tipped investor sentiment on particular companies, for example.

Dan also picked out seven stocks to keep an eye on, including Frontier Communications (NYSE: FTR), Sara Lee (NYSE: SLE), and National Oilwell Varco (NYSE: NOV). Take a look at the article to see why these stocks made the list and what investors might want to do with the information.

You can also visit Fool.com daily as our writers answer the questions of "what," "so what," and "now what" about stocks that pop and plunge in trading.

Is Corning the Tarzan of the Tech Sector?
Investors who want to profit from trends such as smartphones, but who don't want to put money on the tech-stock front lines, might find Corning (NYSE: GLW) appealing. Fool contributor Rich Smith took a peek at the potential of Corning's Gorilla Glass, which the company describes as an environmentally friendly, thin-sheet glass designed as a protective cover for high-end display devices such as notebook PCs, televisions, and mobile phones.

Check out the article for a look at the numbers, as well as for Rich's take on where Corning is today and where Gorilla Glass could take it.

See a stock in this story you'd like to follow? Add it to My Watchlist, which will find all of our Foolish analysis on it.

Fool online editor Kris Eddy owns no shares of any stocks mentioned in this article. Apple and National Oilwell Varco are Motley Fool Stock Advisor recommendations. The Fool owns shares of Apple. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.