Staying safe in the real world can be a hassle. Installing a home security network? Expensive. Training a guard dog? Time-consuming. Hiding your wallet in an under-the-pants fanny pack? Sweaty. Luckily, staying safe online is more manageable. In fighting back against hackers, viruses, and online trackers, here are some of the easiest, cheapest ways to protect you and your data when using the Internet.