Think of this presentation as the driver training course you never had - for the Internet. A companion book ( 200 pages), available on Amazon, provides all the details, links to the best free security software, and much more. You can buy the book on Amazon at http://www.amazon.com/dp/B006UIVA9G/
The most comprehensive treatment of the subject.
Clipping is a handy way to collect important slides you want to go back to later.