The past year has been brutal for dividend-focused investors. Companies that not long ago were considered solid dividend payers -- Morgan Stanley, SunTrust Banks, and Vulcan Materials (NYSE: VMC), for example -- are slashing payouts left and right. Far more companies cut their dividends in April than in all of 2007 (76-44, for the curious).

There's plenty of reason to be sore about those dividend cuts: Mind-blowingly thorough research from Wharton professor Jeremy Siegel shows that dividends are a crucial driver of long-term market outperformance.

But rather than spend the rest of this recession hiding under a rock, we dividend-loving investors can profit. Yes, many companies are cutting their dividends, but there are plenty of stocks not only maintaining their dividends, but growing them -- 59 in April alone!

Spotting the long-haul winners
As we've seen, cuts happen. But fortunately, identifying dividend payers with sustainable, growing payouts isn't exactly rocket science -- you just need to know what you're looking for.

Companies with long, uninterrupted histories of dishing out dividends typically share these three traits.

1. They rake in cash.
Healthy dividends are funded with free cash flow, which means that prodigious cash generation and dividend safety go hand in hand. Dividend-dealing Philip Morris International (NYSE: PM), for example, converts more than 20% of its revenue into free cash. Smoke if ya got 'em!

2. They aren't cyclical.
During boom times, profits in a cyclical industry flow like a Saudi oil well, often leading management teams to overcommit to high dividends and significant expansion. When a cyclical industry tightens up (and such industries always do), cash profits follow suit, and once-high dividend payouts quickly find themselves on the chopping block.

3. They are conservatively capitalized.
Even well-run companies that aren't in cyclical industries can occasionally find themselves on the outs. Look for companies that consistently produce operating profits well in excess of their debt obligations.

By looking out for companies that demonstrate these qualities, you're setting yourself up to find the next great dividend winner.

A company that recently caught my eye -- and that demonstrates these three qualities -- is Motley Fool Income Investor Buy First recommendation Waste Management, the largest player in the trash game.

Trash and cash
Waste Management operates in a pretty mundane industry. But your trash is Waste Management's cash. The company turns a solid 9% of its revenue into free cash flow and pulls in operating profits nearly five times that of its interest expense.

And while declines in industrial trash collection have slowed growth, as those of us who routinely lug our trash to the curb can attest, demand for residential trash collection is extremely consistent.

Owning shares of Waste Management is a bit like having a stake in a collection of small near-monopolies. Building a landfill requires a lot of cash, involves miles of red tape, and incites intense blowback from the locals. These challenges keep competition at bay and have helped lead to consolidation and better pricing in the industry.

It gets better
For starters, there's no real chance that technological obsolescence will undercut Waste Management's service offering. In other words, Waste Management won't play the role of the Sony (NYSE: SNE) Discman to anyone's Apple (Nasdaq: AAPL) iPod. Barring the advent of Beam-Me-Up-Scotty Technology, there are no paradigm shifts on the landfill horizon.

Another plus: Unlike a Qualcomm (Nasdaq: QCOM) or Motorola (NYSE: MOT), Waste Management doesn't have to spend gobs of cash on research and development every year to maintain its competitive position. Waste hauling is as static a business as it is boring -- and that's a good thing.

And unlike with oil, gasoline, and other high value-to-weight commodities, it doesn't make economic sense to haul trash over long distances. That means you don't have to worry about distant competition threatening your relatively captive customer base, as it often does in other industries -- picture your local jewelry store pre-Blue Nile (Nasdaq: NILE).

Dumping it all together
There's a lot to love about such sturdy, growing dividend payers -- just ask one of the company's largest investors, Bill Gates. Waste Management is typical of most Income Investor recommendations: strong, well-managed, and boasting healthy cash flows and a sustainable dividend.

On the surface, there isn't much pizzazz to dividend-focused investing, but as Jeremy Siegel's research and Income Investor's results have shown, the strategy is a proven winner.

Since the newsletter's inception in 2003, the average recommendation (which currently yields 5.2%) has returned more than five percentage points more than the S&P 500. Subscribers receive fresh stock ideas each month, access to all past recommendations, and the team's top six recommendations for new money now. You can try the service free for 30 days with no obligation to subscribe. Click here to get started.

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This article was first published Aug. 29, 2008. It has been updated.

Senior Analyst Joe Magyer owns shares of Waste Management and Phillip Morris International. Waste Management is a Motley Fool Income Investor and Inside Value recommendation. Vulcan Materials is an Inside Value choice. Apple is a Stock Advisor selection. Blue Nile is a Rule Breakers pick. There's nothing trashy about the Fool's disclosure policy.