It’s Tuesday, December 18th. Here’s today’s round-up of news and tips from Consumer Reports—the independent, non-profit organization people trust for ratings, reviews, and news. On CR.org today: Six ways to lower your risk of having a stroke—as well as a detailed look at store credit cards. Are they worth it? And for those of you who may need some extra warmth this winter, it’s important to choose a space heater that’s safe as well as warm.