So, what can you do to protect yourself?
1. Change your passwords
I know we just went through this with the Heartbleed bug, but you really should change your passwords again. You don't know which ones hackers might have.
This is especially important if you've been re-using passwords on multiple sites. You don't want hackers breaking into your bank account just because they hacked a small site you visited one time.
When you change passwords, make sure you know how to create new ones that are strong and unique - click here for my steps. You can also use a password manager like KeePass. This helps you create incredibly strong passwords that you don't have to remember, and it encrypts them so hackers can't get them.
2. Turn on other security
A lot of sites have more security than a basic password. Google, Microsoft, Facebook and other sites offer two-factor authentication.
This means that to sign in to your account from an unfamiliar computer you have to know the password and have access to your phone or another email address. Even if a hacker steals your information, they won't be able to use it to take over your account.