I just came across this great post about Facebook security and a short (1 min. 49 sec.) video on how-to enable HTTPS/SSL encryption on your Facebook account.
Blah blah blah. Whatever. You don’t have to understand it to do it.
Bottom line, changing this setting makes your account secure (in theory, because apparently, even Zuckerburg himself isn’t immune to hacking) when you’re browsing in wifi areas like coffee shops, bookstores, etc.
Here’s the video. Take a minute and 49 seconds to watch it, then 10 seconds more to make the change. It’s a good use of two minutes.