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.

When Will This Stock Be Worth Buying?
Fool contributor Chuck Saletta has advice for investors who have a tough time deciding when to buy a particular stock.

"If you're prepared with a list of companies you're willing to buy if conditions are right, you don't need to know when that company will be worth buying," Chuck wrote. "Instead, you simply need to wait until the market's volatility makes any of the companies on your watchlist worth buying, then pounce on that one when the opportunity presents itself."

Chuck shares five companies -- including Pfizer (NYSE: PFE), Kraft (NYSE: KFT), and General Growth Properties -- that are on his watchlist and explains why they haven't yet made it into his portfolio

Read the article for more on the value of having a watchlist, and then set up your own watchlist with the Fool's free My Watchlist service.

The Consensus Opinion on Apple: Mostly Bullish
Maybe you've heard that investors are bullish on Apple (Nasdaq: AAPL). Before you act on that sentiment, let Managing Editor Brian Richards take you on a tour of who creates the bullishness and point out one bearish indicator.

"Analysts are extremely positive on Apple," Brian wrote, with 50 analysts giving the stock a buy rating, three saying hold, and one advising investors to sell. Brian checked out five other sentiment drivers and came upon one soft spot: insider buying and selling.

"Over the past year, Apple insiders have sold $252 million worth of their company stock … [but] didn't buy a single share of stock," Brian reported.

Check out the article for more on the consensus opinion on Apple, and check back to regularly as Brian goes through this exercise with other stocks.  

Here's How You Can Profit From the Turmoil in the Middle East
Gold, nuclear power, and natural gas all offer ways to make money from the Middle East turmoil that's pushing oil prices higher, according to Fool contributor Sean Williams. He explains the difference between West Texas Intermediate (WTI) crude and Brent crude and then talks about how investors could use indexes that follow each -- United States Oil Fund (NYSE: USO) and United States Brent Oil Fund (NYSE: BNO) -- to make money when their prices diverge markedly.

Sean also takes a step back from the obvious (oil) to talk about other sectors that might gain from volatile oil prices. For example: Fluor designs and builds nuclear facilities, and Chesapeake Energy (NYSE: CHK) has a strong portfolio of natural-gas interests. Even if you're not a gold bug, the SPDR Gold Trust (NYSE: GLD) deserves a glance, as prices could rise when investors flock to the safety of gold.

See the article to get the full picture.

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.

Chesapeake Energy and Pfizer are Motley Fool Inside Value selections. Apple is a Motley Fool Stock Advisor recommendation. The Fool owns shares of Apple and has written puts on Apple. Motley Fool Alpha owns shares of Chesapeake Energy. 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's disclosure policy is a hoot and a half.