1. Keep your contact information up to date
This might be the most neglected part. When a domain owner changes his email address or contact information, he or she is strongly encouraged to inform his domain registrar immediately. Many fraudulent domain transfers are due to outdated contact information.

2. Keep track of the expiration dates of your domains
When your domain falls into redemption period, you must pay USD250 to renew your domain. When domain redemption period has passed, you will lose your domain forever.

3. Check who is listed in your contact information
You or your organization should always be listed as the organization and administrative contact. In other words, when registering a company domain, ensure your company name is listed as the owner of the domain, NOT your freelance web designer or your web hosting provider. By all means, the business owner or an executive (preferably a senior and loyal one) should be listed as administrative contact.
This person has the RIGHT to change ownership of company domain names.

4. Do not reply to / click on any links in any domain related emails which you do not recognize (they are NOT your domain registrar)
Do not reply to any renewal notices you receive in the email sent by companies that you do not recognize. Domain hijackers and unscrupulous registrars send these “domain transfer email” from time to time hoping that you will accidentally confirm the transfer.
When in doubt, do not hesitate to contact your original registrar to verify.

5. Your registrar’s domain name should be included in your spam filter’s approved sender list
Many domain owners are using a spam blocking service. Your ISP could also have it in order to block spam. However, with this, you run the risk of not receiving domain renewal notices from your domain registrar.
Add your registrar to your approved sender list. This will ensure that you receive all renewal notices in your inbox.