The most important thing you can do to protect yourself today is to use a different password for each account. No excuses, no exceptions: every password needs to be different. It’s even more important than using hyper-complex 24-character passwords full of upper-case letters and numbers and symbols, although you should do that too. This takes a short explanation. If you’d rather move on, just remember: do not reuse the same password, ever, amen. Hackers will learn one of your passwords someday. Just accept that. Maybe you’ll be tricked by a phishing email message and you’ll type your...