Use a secure password. This means something better than just taking your pet’s name. We have information in Keeping Your Hosting/FTP Password Secure.
Have your site scanned regularly. A lot of companies offer tools that will go through your site looking for malicious/suspicious-looking code or activity.
Update your website’s software. If you use something like WordPress®, keeping your software up-to-date is the difference between your site running smoothly and having a site infested with malware
By being aware of the threat of hackers and taking a few precautions, you can stop your site from harming visitors and other sites around the Internet.