One other tip from a brother Disc priest: Go on a one-week Flash Heal diet. I'm serious; don't cast FH for a week and see how it changes your playstyle. I initially replaced FH with Binding Heal in my loadout for the first week that I was healing 5-mans. Give this a try. Yes, it's not the same and you may overheal. So what? The point is to force yourself to change any bad habits.
I've gone so far as to remove FH from my toolkit entirely (replacing it with Smite), since it's just that bad for Disc Priests. I wouldn't advise being that extreme in Holy, but the (cough) discipline of removing FH from your lineup for a week might break the Wrath habits.
Oh, and the first time that you try this drastic of a change, bring 2 guildies with you. That way, it's not only a Guild Run, but the PUG'rs can't kick you. Rather, you can kick them for being undergeared or unsympathetic to a player who's trying to improve. This worked wonderfully for me the other day.
Last edited by Tiata; 01-29-2011 at 10:18 PM.
"If the Truth can be told, so as to be Understood, it Will be Believed." - Terrence McKenna