I changed my F1-4 macros for healing party member other than the tank directly (which include yourself). The 1-5 keys are my normal fight keys so its very little effort to hit a direct heal. It takes a bit of getting used to being party member -1 but its become habit.

I also since I have a pally tank use the "Clique" in combination with "Grid" to be able to BoP a party member in trouble or cleanse at a left or right click. Which normally allows enough time for my healer to hit them directly with a heal.