Many computer users (nowadays we can generalize for internet users) do not know the dangers, clicking on a link, open a stranger, number receiving SPAM, among other ills that plague the digital world, I recommend reading the post 22 questions answered about digital security. He gives tips on how to act in certain situations.
Consider myself a very advanced user, almost a Geek (cool name for computer geek) and found some cool tips on this link.
If one had to rank the links that point out, this would certainly be on the list of "Highly Recommended".
