"The US natural gas storage cycle is fairly straightforward: More gas is consumed in winter than in summer because natural gas is a key source of heat," explains Elliott Gue.

In his industry-leading The Energy Strategist, the energy sector specialist makes a bullish case for natural gas as well as contract driller Nabor's Industries (NYSE: NBR).

"The year started off with gas storage levels falling in line with the average. In late February or early March that all changed: Storage levels jumped and eventually broke to a new five-year high.

In his Validea newsletter, John Reese selects stocks using the investment strategies of the market's leading gurus, such as Benjamin Graham, John Neff, Warren Buffett, David Dreman, and Peter Lynch.

The advisor, and author of the just-published The Guru Investor, recently ran a screen based on the investment strategy of Kenneth Fisher to find his latest buy recommendation -- Kennametal (NYSE: KMT).

Reese explains, "For decades, the price-to-earnings ratio has been the most widely used valuation measure for stock investors, and a key tool in the arsenals of many of the gurus I follow. ut in 1984, Kenneth Fisher sent a shockwave through the P/E-conscious investment world.

"We are moving headlong into oil," notes John Reese, who analyzes stocks based on the criteria used by "legendary" investors such as Buffett, Graham and Lynch.

In his Validea newsletter, he says, "My fundamental models indicate that the oil industry is where the best values in the market are." Here's a look at W&T Offshore (NYSE: WTI), which is based on the criteria used by contrarian David Dreman.

"The economy and stock market have gone through a legitimate crisis because of the credit woes, and it takes time for something like that to work itself out.

"But the important thing to remember is that we've been through financial crises before -- even bad-debt financial crises like this one -- and the market has always stabilized and then pushed higher.

"And history has shown that those who can stick with the stock market through down times like these will be rewarded.

"David Dreman -- one of the gurus I base my strategies on -- notes in his recent Forbes column, 'If you pack up now, chances are you'll miss a good part of the next bull market. A large part of the gains are always made in the first few months of one, when market-timing investors are still on the sidelines.'

"First recommended in September 2004, Helix Energy Solutions (NYSE: HLX) is the oldest holding on our Buy List - and the biggest winner, gaining 133%," notes Richard Moroney.

Here, the editor of Upside explain, "Considering its bright profit-growth prospects, reasonable valuation, and impressive Quadrix scores, Helix remains among our very best ideas and a top pick in the oil patch."

"Helix serves energy producers worldwide, providing such contract services (36% of total revenue for the nine months ended September) as deepwater pipe-laying, well operations, robotics, and reservoir services.

"The shelf-contracting business (34%) consists of 59%-owned Cal Dive International (NYSE: DVR), a provider of dive-related and shallow-water construction services.

"The fast-growing oil and natural gas production business (30%) focuses on marginal, mature, and smaller fields - properties no longer significant or viable for large energy companies. Fueled partly by high energy prices, petroleum companies are increasingly targeting mature and small reservoirs.