Let's get one thing straight: To get obscenely rich in the stock market with a buy-and-hold strategy, you need to own the best companies. There's no other way around it. But how can you determine what the truly best companies are?

I'm here to tell you that there are five simple characteristics shared by every single one of the best companies on Earth. If you can identify these five traits and have the discipline to invest at the right times (and perhaps sell if things change), you'll never have to worry about money again.

The fab five 
Without further ado, the five traits are:

  • Creation of high utility for customers
  • Something special
  • High rate of innovation
  • Excellent managers
  • Efficient operations

It sounds like a basic list, but when you come down to it, business is basic -- the production of a good or service for a customer. The quality of a company depends on how useful its product is, how defendable its markets are, and how fast it can produce new and better products. Solid management and cost-effectiveness are musts as well.

The fab five, one by one 
Let's examine each trait and look at some examples:

"Creation of high utility for customers" means producing a good or service that customers value very highly, or literally can't live without. A perfect example is Rockwell Collins, which produces navigation and landing guidance systems for airplanes. I don't know about you, but I'd say any piece of equipment that allows a plane to land creates a lot of value for airlines and passengers. This, in turn, creates steady demand for Rockwell Collins' products.

"Something special" is intentionally broad, because this trait comes in many forms. The company needs this little bit extra to maintain its advantage and inhibit competition. It could be a patent, a secret formula like that of Diageo’s (NYSE: DEO) Johnnie Walker scotch, or a valuable network, where more advantages flow to the company the bigger the network gets. A special manufacturing process or distribution network that allows a company to be the lowest cost provider could be a significant advantage. Look no further than warehouse operator Costco Wholesale (NYSE: COST), which has an enduring low-cost advantage that's tough for traditional competitors like Safeway (NYSE: SWY) to match.

"High rate of innovation" relates to how a business must constantly improve to stay ahead of its rivals. An excellent example is Apple. I recently dug my first iPod out of a box and was amazed at how clunky it is. Plus, it only has 10 gigabytes, whereas the new models have 120 gigabytes -- 12 times as much, and, I'm embarrassed to say, more than my home laptop. Almost all businesses have to innovate to survive and grow, so an ability to do this effectively, a la Apple or even Nike (NYSE: NKE), is crucial.  

"Excellent managers" is self-explanatory. A company is only as good as its assets and the people using them. General Electric is a great example; it spends an estimated $800 million every year on educating its employees and managers. As a result, GE enjoys dominant market positions and boasts highly regarded managers, who rank among the most sought-after executives to lead other companies. One of those managers, Mark Donegan, left to work for Precision Castparts (NYSE: PCP), an aerospace and industrial manufacturer. Under his leadership, Precision Castparts has produced an impressive track record of increasing the performance of acquisitions and its own operations through a vigilant focus on costs and quality control.

Finally, the company needs to "operate efficiently." This enables the business to earn enough money to focus on the first three traits. The pioneer of efficient manufacturing is Toyota, which was the early adopter of lean manufacturing and kaizen techniques. Other companies, such as industrial suppliers Danaher (NYSE: DHR) and filtration systems provider Donaldson (NYSE: DCI) have excelled at lowering costs by using the same techniques.

Start investing 
That's it. The five characteristics of each truly brilliant business on this planet. They are self-evident, yet ever-so-difficult to obtain and hold.

I encourage you to think about every company in this light. How much value does it really create for the customer? Can it do something no one else can do? Is it well-managed? These questions are simple, but the implications are very deep, and if you can check off even four out of five boxes, you'll likely have a winner on your hands.

This is all we do at Motley Fool Inside Value -- focus on identifying companies with these characteristics, and pick our spots to invest in them. We're extremely pleased that many of the world's best businesses are on sale now.

Good luck investing! If you need help, consider taking a 30-day guest pass to Inside Value. You'll get all of our recommendations, including our five best ideas for new money now, as well as a discounted cash flow calculator you can use to evaluate companies on your own. Click here to get started.

This article was first published March 1, 2009. It has been updated.

Fool analyst Andrew Sullivan unfortunately has no financial position in any of the stocks mentioned in this article. Apple, Costco Wholesale, and Precision Castparts are Motley Fool Stock Advisor selections. Costco Wholesale and Rockwell Collins are Motley Fool Inside Value picks. Diageo is a Motley Fool Income Investor selection. The Motley Fool owns shares of Costco Wholesale.

The Motley Fool has a disclosure policy.