ps aux | grep, eliminate grep process from result

Today with zabbix i have urgent need to eliminate grep process by itself from result.

This is my command at startup:

ps -aux | grep pmon

The problem is that grep process is also listed in the result.

Solution is to add exactly grep -v grep just before actual grep:

ps -aux | grep -v grep | grep pmon

Another solution is to write your keywords first letter into square brackets:

ps -aux | grep "[p]mon"

What was your age when you had to deal with this situation for the first time?
I am 30 now!