Originally Posted by Griggsy

What he said works well for many folks.

Or try Event Alert - it can flash the screen and put a big icon up on the screen to alert you anytime it's up.

For me this is a god-send since I am often leading raids and have to pay attention to many other aspects of the fight and what others are doing and would otherwise miss my own procs without something so obnoxious as this to remind me.