Ars Technica:

in this article, the first in a five-part series covering online security, we’re going to talk a bit about keeping yourself (and your business) safe on the Web. Even if you know what lurks in the dark corners of the Internet, chances are you know someone you who doesn’t. Consider this guide and its follow-ups as a handy crash course for those unschooled in the nuances of online security.

You can never know too much about keeping yourself and your friends and family safe on the internet.