How many error pages do you use?
 

Ok well I have had my 404 for sometime now and was wondering how many pages would anyone recommend to put up on errors. Whats the standard for such things? 404, 401, 410, 403, 500 etc I mean the list can go on an on.

I just used the Custom Error Page Code Generator available at HTML Basix which lets you create a custom error page for:

301 Moved Permanently
302 Moved Temporarily
400 Bad Request *
401 Authorization Required *
403 Forbidden *
404 Not Found *
405 Method Not Allowed
408 Request Timed Out
415 Unsupported Media Type
500 Internal Server Error *
501 Not Implemented
502 Bad Gateway
503 Service Unavailable *
504 Gateway Timeout
505 HTTP Version Not Supported

Not many of them are used as much say as 404/401 etc, but I guess it's best to have them in place.