@Dorffo: I drive with the mouse a good portion of the time when I am soloing so this is pretty familiar to me, but for my team I have all my priests' targeting/healing macros set up on the numberpad and use my right hand there during a fight to cast heals rather than having it on the mouse 100% of the time.

Does it work better to set up heals another way, or do most people constantly switch back and forth with the right hand, with the danger of being slow on a heal cast due to having my hand 6 inches away on the mouse? I realize the time difference is pretty small, but on occasion a timely heal can make all the difference.

Please feel free to add suggestions for other ways to control the healer for my team, I am still new to this whole experience and the learning curve can be steep at times

My current setup for heals is the following: (all the following keys are numberpad keybindings on the far right action bar)
macro on key: + = target tank by name
macro on key: 9 = target mage 1 by name
macro on key: 6 = target mage 2 by name
macro on key: 3 = target warlock by name
macro on key: . = target healer by name
1,2,4,5,7,8 = macros for various priest healing spells, cast after targeting the desired member with the macros above
0 = fade

Sounds complicated when I wrote it out, but if you look down at your numberpad it might make more sense.

Again, any thoughts on a different way to take care of healing would be welcome