Check every link on your website

There are two approaches to this,

• Manually navigate through your site and click every link you find both in the menus and in the content. This manual 'hands-on' approach has the added advantage that you are forced to view every page on your site and that might reveal some other issue or bug (e.g. a broken image in some page content). However, websites with hundreds or thousands of pages can be impractical to scan manually, so the other approach
• There are some great link-checker add-ons for web browsers that quickly highlight broken links on the page you are viewing. Or, broader solutions like Google's Webmaster Tools provide error reporting on broken links/pages across your entire website.

Review error logs

Most web servers include a log file that stores error messages over time. Reviewing these log files can provide important insight into issues with your site. If you're not a techy person, it can be tricky to understand some of the messages in the log file (or even find out where the log file is). If you are not familiar where the logs are stored, ask your hosting provider. Or, you can invest in some user-friendly error reporting.

Most modern Content Management Systems can be configured to send an email with a detailed report when an error happens. You don't necessarily need to understand the error message, just that an error happened and it may warrant some follow-up.

Test contact information

If you're sharing ways to be contacted (email, phone, mailing address, etc) then make sure they work! Not everyone has a contact form (if you do, it should be on your list of things to test) but at the very least, most people share an email or phone number on their site. Make sure this information is current and that it works.

Validate code

The World Wide Web Consortium (W3C) offers a free validation tool that checks for errors in your web code. This is another test that can be tricky for non-techy persons to understand (what the errors mean), but at the very least you can get some insight into whether your validation errors are increasing or decreasing, which may indicate the need to look further.

Test Accessibility

Accessibility is an extremely broad topic in that it includes people with and without disabilities. The goal is to provide all visitors with equal access to information and functionality. Step one in testing for accessibility is understanding the types of visitors you want to accommodate. For example, if you want your site to be easily accessible for the blind, you can use a text-to-speech program just as they would.