I don't know what software you use but I use ISBoxer and heal with Repeater Regions + VuhDo. VuhDo is an addon that creates scalable, movable party frames that you can click to cast spells on the target (left click, right click, shift click, etc, it's programmable) and Repeater Regions are just like they sound. I put my mouse on a specific region (where my VuhDu frames are) on my main and that region is repeated onto my healer. Much easier and more efficient than macro healing.

I have some healing macros on my blog from the olden days, I think. http://coltimar.com/blog if you want to check them out.