Internet hazards like viruses are, for the most part, easy to avoid. Shady Web sites usually look shady; e-mail attachments from spam addresses are never worth opening. Antivirus software is always a smart precaution, but smart browsing is an even greater ally. What does this have to do with protecting your data in the cloud? The same rules apply when it comes to buying online or creating accounts on new Web sites: Make sure the site is trustworthy.
If you're buying from a retailer you've never heard of, do a little research on them first. They could have notoriously lax security and have a history of losing customer credit card information to hacking breaches.
Finally, be aware of what computers you're logged into. Browsers will often ask to save your login information and keep a login session alive as long as the browser is open. If you log in to Facebook or your e-mail account on a friend's laptop and then leave, you'll likely still be logged in to those sites. If they're trustworthy, that may not be a problem. But what if you're using a public computer? Stay logged in to one of those and anyone could gain access to your account. Yep, that would be bad. Unless you're using your own computer, remember to log out and never save your password and user information. Browse safe, and with a little luck, you'll never have to worry about anyone finding a single one of your online passwords.