8. Most sites require an email address for you to register for their services, but don’t use one that reveals your real name or workplace. Try an online email service such as Hushmail.com and, for maximum security, open a new email account for each website (this will also show you if a particular site is selling on your address).
9. If you suspect that your passwords have been compromised by someone you know, change them. And if you’re using the same password for everything, change that too – there’s no need to do since you can keep track of all your login details with a program such as Steganos' Password Manager.
10. If someone unscrupulous has had access to your credit-card or bank details, obtain a copy of your credit report from a credit-check companies such as Experian. Experian offers a free online credit report with a 30-day trial, as well as services such as automatic ID fraud notification.