I am new here, but I do understand the basics of healing quite well from other MMOs.
  • Arrange the UI the way you feel comfortable. Feeling comfortable looking at your screen, knowing exactly where all your abilities are, and being able to click someone to heal in your group frame easily is crucial. There is actually a very good discussion on these threads about that. http://forum.square-enix.com/ffxiv/t...3-Healer-HuD-s
  • Understand all your abilities. Research is key and the better you know your class the easier it will be in any situation.
  • Know where to stand. It may seem silly, but I have seen healers stand in possibly the worst positions every for AoE damage or cones. Why heal more than you have to?
  • Understand and accept that most players won't necessarily think of what makes it easier for you. Usually only other healers understand the woes that only a healer can understand. Prepare for that and prepare to pickup their slack.