The five most popular stories on CNN.com during the last 24 hours, according to Newspulse.

5 credit score killers: As banks shy away from making risky consumer loans, a mediocre credit history just won't cut it anymore. To get the best rates on mortgages, credit cards and auto loans, you need a killer score.

Hit-and-run caught on camera: A woman in an SUV hit a pedestrian in a crosswalk, but police say she fled the scene.

Understanding the health bill: CNN's John Roberts interviews Jim Acosta about the House passage of the Obama health bill and what it means for Americans.

Biden drops f-bomb: After introducing the president, a microphone picks up Vice President Biden saying, "This is a big (expletive) deal!"

Obama signs health care reform into law: President Obama signed sweeping health care reform legislation into law Tuesday, hailing the moment as the latest example of America facing up to major challenges for the benefit of all its people.