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

The Best Buy in Wireless
It pays to look beyond the obvious. For instance, it's simple to see how Best Buy (NYSE: BBY) will benefit from offering roaming laptop users the ability to consume up to 5 gigabytes of data per month. Best Buy is charging money for a service people want.

But Fool Tim Beyers points out that Sprint Nextel (NYSE: S), whose 3G network is doing the heavy lifting for this venture, is the real winner here. "By giving computer users a glimpse of what it's like to have anytime, anywhere access to the Web, it'll increase hunger for the WiMAX service it's delivering in concert with Clearwire (Nasdaq: CLWR)," writes Tim.

Click to the article for Tim's look at what else is going on in the space.

Is the Internet Hurting Your Brain?
Do you find it hard to settle down with a good book? Do your kids seem unable to communicate face to face? Nicholas Carr -- who wrote an Atlantic cover story in 2008 pondering whether Google is making us stupid -- talked to the Fool about how the Internet is "turning us to perpetually distracted creatures."

Here's a tidbit from that conversation: "I do think that we are short-circuiting the kind of mental processes that underpin deep personal knowledge, and that also, by extension, have been the foundation for a lot of our culture through the years."

Click to the article to see how Apple's (Nasdaq: AAPL) iPhone and Research In Motion's (Nasdaq: RIMM) BlackBerry play into Carr's theory. Then weigh in with your thoughts on the balance between Internet peril and enrichment.

Is Japan the New Europe?
Motley Fool fund guru Amanda Kish brings investors a gift in each hand. She's got a bead on a market movement and the lowdown on why it's worth watching, but probably not worthy of your big bucks.

On the one hand, Amanda tells readers that many global fund managers are turning to Japanese stocks. "In the first half of the year, Japan-focused mutual funds put up some of the best performance among all foreign categories," she writes.

On the other hand, Amanda goes on to say, six months isn't a very long time, and "Japan stock funds have been a bit of a black hole in recent history."

Click to the story for more analysis and Amanda's advice on how to use exchange-traded funds such as iShares MSCI Japan Index (NYSE: EWJ) and individual stocks such as Canon (NYSE: CAJ) in your portfolio.