nother usefull macro for healers is:
/target %self
/useskill Major Heal/Greater Battle Heal, etc
-this is usefull so, for example u are healing a party member, and u suddently get attacked; u dont need to waste time going with the mouse to ur HP bar, clicking it, then clicking the F where u have the heal.
With this macro u can keep ur mouse on the party members' bars, heal urself, click the party member, heal him, heal urself, etc etc. Saves u a lot of trouble and a lot of oil for the mouse, which is quite expensive these days

Also, feel free to try some combo's. I use for example:
/useskillforce Mana Burn
/useskillforce Trance
-I do this because when u use mana burn on a sleeping enemy, he wakes up

so this way u can keep him asleep (unless trance fails xD)
Many ppl use for example, on a sps
/useskillforce Surrender to Water
/useskillforce Ice Vortex
/useskillforce Ice Vortex Buster
then they have another macro with hydro blast
/useskillforce Hydro Blast
repeat
repeat
etc
-u can try this, but sometimes its not advisable, since u may have to spam cp pots or run, and the macro will be interrupted.
macros depend on ur playstyle and what u do with ur char (pvp/pve/raids/sieges/etc). Some work well for some ppl, others dont. Some work well on some servers, others dont (for example in some servers u cant spam cp)