Personally, I like
grid. I show who has agro, renews, pw:shield, incoming heals, in a compact grid showing all parties.
I'm a button healer, so along with grid, I have my heals on the 1 to 6 keys. I click the person in grid and tap the appropriate heal action with my left hand.
Others like to mouse-click heal, and combine grid with
clique to accomplish that.
A popular alternative to what I use is healbot, which is another click casting addon.
When I first entered AQ, I felt the same as you. Everybody else was healing so fast, I could hardly get anyone targeted. Keep practicing.
Use PoM as an opener on your tank if someone else hasn't thrown it. Throw renews around the raid as needed. Renews stack, so if 3 priests each put a renew ticking +700 on the tank, that would be +2100 per tick. Pretty cool.
You will be fine. You may want to use a damage meter (I use Violation) so that you can watch your amount healed increase while hopefully having your overheal numbers go down a bit.
Edited, Nov 28th 2007 7:42am by dadanox