Watch a log and/or search for a certain term
tail -f /home/account/logs/website.com/http/error.log
As the errors pour in, you will see them come by. Change 'account' to the username you have on dreamhost and website.com to the domainname you host there. If the errors come in large amounts you can filter them by using grep:
tail -f /home/account/logs/website.com/http/error.log | grep -i "search_term"
Now only errors containing 'search_term' will be shown.