"Despite more than doubling since we first recommended it just shy of two years ago, Sprott Resources (SCP), a Toronto-listed resource company, remains a strong buy, selling at a discount to a reasonable asset value," says Adrian Day.

The money manager and editor of The Global Analyst explains, "Sprott makes direct and indirect investments in the resource sector, frequently with new businesses which it subsequently takes public after nurturing them.

"One such is Orion Oil & Gas, of which Sprott still owns 78%, and remains undervalued. After more possible acquisitions, Orion could increase in value and more shares be spun off.

This post is part of a special annual report -- Top Stock Picks '09 -- in which TheStockAdvisors.com asked 75 leading newsletter advisors to select their favorite investment for the new year.

As his top idea for 2009, fund expert Doug Fabian eyes Powershares DB Crude ETN (NYSE: DXO). In his Successful Investing newsletter, he looks at "an aggressive fund" that moves double the underlying index.

The advisor continues, "I like oil at its year-end 2008 bargain prices. One way to invest in oil and ride its likely rebound during 2009 is to buy the PowerShares DB Crude ETN.

"This is a two beta or double long exchanged traded note. This is an aggressive position and should only be used with more speculative capital.

"In late 2008, oil was trading 60% below its 200-day average, a very rare occurrence. Indeed, oil has fallen 70% from its 2008 highs.

"DXO seeks daily investment results, before fees and expenses, which correspond to twice the daily performance of the Dow Jones U.S. Oil & Gas index. If the Dow Jones U.S. Oil & Gas index moves up 2%, DXO will gain 4%. This ETN could recover strongly in 2009."

Steven Halpern's TheStockAdvisors.com offers a daily look at the latest market commentary and favorite stock picks and investment ideas from the nation's leading financial newsletter advisors.

This post is part of a special annual report -- Top Stock Picks '09 -- in which TheStockAdvisors.com asked 75 leading newsletter advisors to select their favorite investment for the new year.

"ProShares Ultra Oil and Gas (NYSE: DIG), my top idea for 2009, is an exchange-traded fund that positions itself with the performance of the United States' top oil and gas companies," says growth stock specialist Paul Tracy.

In his StreetAuthority Market Advisor, he explains, "The 'ultra' part of its name means that the fund uses leverage, which magnifies returns by a factor of two relative to the Dow Jones U.S. Oil & Gas Index."

The advisor continues, "DIG is a leveraged ETF. In short, for every 1% the U.S. Oil & Gas Index rises, DIG should rise 2%. That means the performance of DIG is dictated by the moves of the largest industry heavyweights like ExxonMobil, ConocoPhillips, and Chevron.

"In addition to integrated oil companies, DIG is also exposed to major oilfield service companies like Schlumberger and Halliburton and gas-industry leaders like Apache.

"The world simply cannot, in its current form, live without fossil fuels. Global demand for petroleum is roughly 85 million barrels of oil a day, which means the activity in the oilfields simply never stops.