Faced with 1 million people who left voice mails saying they wanted to buy health insurance, the federal government is giving people two more days to sign up on the federal exchange.

It's that time of year again: the open enrollment period for people shopping for health insurance on the Affordable Care Act exchanges. Open enrollment started Nov. 1 and runs until Jan. 31, 2016. In this guide, we've compiled what you need to know to get started.