If you had to teach a class about information literacy, what would your key points be?

I'm in an online course right now that touches upon information literacy: the ability to access, sort through, and analyze information (particularly online). It is not a very in-depth course, and a lot of the recommendations it gives feel a little limited/dated, or just out of touch with current internet practices (e.g. trust .edu and .gov sites -- don't trust .com sites; use Britannica Online instead of Wikipedia). It also doesn't really account for things like memes, social media, or really much of the modern internet landscape.

I know we have a lot of very technically literate as well as informationally literate people here, and I'm curious: if you were tasked with creating a class to help people learn information literacy, including how to identify misinformation online, what would some of your key points or focuses be? How would you convey those to your students (whether those students are kids, adults, or both)?