Here are a few things you can do: 1. Make sure your passwords are strong. This goes for your main account password, to any password that you use within your site to access sensitive areas. 2. Protect your administration folders with .htaccess authorization. You can do this through IP protection, or, having another user name / password combination to gain access to the folder itself. This is a quick overview here. 3. Depending on your hosts setup (suphp, suexec), you may want to check permissions on your files and folders, to ensure that no one else is able to read them. 4. Review your sites logs. Look through the web and ftp logs to ensure that no one has messed with your site.
With static pages, there is not much you can do. You only need to worry about server security (which I'm assuming your web hosting company is taking care of).
Seriously, take care of your desktop (lots of desktop virus infect html files that get pushed to your site) and use a strong password. --dd http://sucuri.net
yeah, Specially if you using windows OS. It is more attacked than others. Virus is a problem that exists only in Windows world.