The following is the first of what will likely be a series of film showing strategy for raid bosses, specifically for healers. While I use a Priest and will discuss tactics thusly, some of the information can apply to several healing classes. I don't claim to be an expert at my field, but I've been around long enough to know a thing or two, and hopefully this will help someone keep a tank alive!
I'd like to address before this begins and the questions come up; why I don't use any healer add-on's. I've personally never found one I enjoy, and feel they lead too many healers to second guess their own healing, and assume what other healers are going to accomplish. In the end it's always what gets the job done for you.
Lastly, this is a Priest Healer's UI, not fancy-shmancy pvp style...it will be messy :).