Geoff Colvin is no Pollyanna. He admits in his latest Fortune column that he could identify in his sleep 10 reasons why 2013 will be “lousy for business and the economy.”

But Colvin sees some signs for optimism as well. One source for an optimistic outlook is the “revolution in American oil and gas.” Others depend on politicians.

The 113th Congress, spooked by the loathing rightly heaped on the 112th, finally acts on its three most important priorities: reforming the tax code by lowering rates and closing loopholes, making Medicare sustainable, and fixing immigration laws to attract and keep the world’s best and most ambitious.

President Obama, finished with running for office and envying Bill Clinton’s extraordinary stature domestically and globally, decides to go for a statesman legacy rather than a progressive-hero legacy. He gets behind tax reform by emphasizing its fairness; stresses that Medicare isn’t being cut but saved; and negotiates a procedure for legalizing illegals as part of immigration reform. Photos of him signing landmark legislation with leaders of both parties behind him build his image as a pragmatic doer rather than a far-left class warrior.

The Affordable Care Act takes effect mostly glitch-free as the administration realizes that major implementation problems could tank the economy. The law is filled with requirements that seem difficult or impossible for employers to meet; for example, employers must offer “affordable” insurance to workers, but affordability is defined as a percentage of an employee’s household income, which employers have no way of knowing. The IRS has announced that for now employers can base calculations on employees’ W-2 income and needn’t offer affordable insurance for workers’ dependents. More such lenient interpretations will ease a hellacious process for employers and workers.

The SEC and other regulators finally stop making excuses on Dodd-Frank rulemaking, clearing the fog that sits over financial markets. The administration has missed 60% of the rulemaking deadlines imposed by the law, says the latest tally by the Davis Polk law firm; 65% of the total required rulemakings still haven’t been finalized. Reducing that uncertainty will liberate one of America’s greatest economic strengths, its capital markets.

OK, so maybe Colvin does have a little too much faith in politicians. Still, it would be nice to see them own up to their mistakes and try to correct them in the new year.