SERVER ERROR LOG

One of your main aids in tracking down bugs is your server’s error log — look for such items as missing images, bad links, and errors from CGI scripts, just to name a few. Use this excellent tool on a regular basis and after every update to your site.

Website errors mean lost traffic. It is normal to have a few errors in your log files, but if the error rate starts to rise precipitously, then look for what’s causing the problems and fix them.