Graphics that are jagged or fuzzy. A site that looks great on the most current browsers and state of the art computers, but that is unusable on older systems. My nephew has a copy of Front Page. Judge his work by the standards mentioned above. Define who your intended audience is, and give them some compelling reason to come to your site.
Useful sites keep their visitors for longer periods, and have return visitors.
This is crucial. With over one billion webpages fighting for attention, search engines eliminate static webpages from their indexes. You may have a wonderful site, but people need to be able to locate it. Host your site with a reputable company, that will function reliably. Make sure to register for a domain name that accurately reflects the name of your business.