An error 404 is when a visitor wants to access a page that does not exist. Sometimes people tend to overlook this feature, and never think about designing for it. Taking the time to make a user-friendly 404 error page could mean the difference in a user staying on your website, or leaving.
In this list I have gathered some of the most useful tutorials for creating a 404 error page from scratch. We'll start with the design of an error page in Photoshop and than implementing the error page in Wordpress with settings and code.