You may have heard about the “Heartbleed” bug. Essentially, you have to do three things:
- Get a password manager. I use and highly recommend LastPass ($12/year; well worth it).
- Use the password manager to replace the passwords. See the link below for the websites affected: http://mashable.com/2014/04/09/heartbleed-bug-websites-affected/
- Enable two-factor authentication wherever available.
If you want to read the details on the bug in plain English, here is a link: