If the healer dies, sometimes it's the DPS's fault for pulling agro and the healer trying to keep them alive.

Everyone should have Omen or similar threat meter. Healer, get Healbot.

QFT (Quoted For Truth)

This comes off frequently as such a cliche, but is so true. To expand on it, my tip would be to make sure your members are comfortable with their roles. There are few things less enjoyable in this game, IMO, thank playing with someone who is uncomfortable with their role or, worse, doesn't like it - like the hunter who can't find a group and pugs his healer, but gripes about other dps'ers or QQs about healing the whole time. Your tank should be okay with handling the pressure associated with tanking, your healer should be cool with the priority of healing (pre-heals on tank, heals as needed on dps'ers without healing capability, triage only on slef-heal dps'ers), and your dps should understand what they can and can't do (like rules about fear, hunters who leave growl on their cats, rogues who can't or don't sap on cue). A well-run instance should result in a learning experience - something to build on for future runs - and that's often not the case when people don't feel good about their role.

I, for one, don't think you benefit from running lower-level instances than you are - the challenge, to me, is not as palpable - I learn more when I know a bad pull is going to create a wipe. And if you haven't done Ramps yet, watch the cluster at the top of the stairs - it always ends up worse than you plan :-)

I can agree with that comment.

Best tips for a tank: Your healer is your best friend. If you have a good healer you can make it through almost anything. Tanking isn't all that hard, you just have to keep threat on the kill target and make sure to not pull if your healer is at 20% mana. If your DPS pulls off you, they need to learn how to reduce their threat (iceblock/invis, feign, feint, talent points, etc). Take it easy and breathe :D We're all in this together.

To new healers: The absolute biggest problem I had when I started healing was forgetting to heal myself. I would watch the left screen for my party and heal them when needed while completely forgetting about myself (I'm not silly enough to stand in the aoe fire am I? .........) The best advice given to me was to pull your party window out so you see it in the middle of the screen. This was really easy to do with raids. If you're not opposed to mods, I'd suggest Grid. It keeps a window for your parties health at all times and it's really small so you don't have to worry about it taking up your whole window. Now I just heal anyone on the little screen that needs a heal and Hey look! I just healed myself! Yay!! Remember to prioritize your healing (like someone else mentioned). Heal your tank, then yourself, then your DPS. You and a tank can make it through most encounters by yourself, then DPS just help you do it faster and make it easier. :D