What's the basic tactics for a shaman in an instance group being a secondary healer/tank?

In (some thread), I give the following answer:

Q u o t e:
In BRD and BRS, I do the following:

1) Backup healing. I am always watching the main healer's mana and everyone's health.
2) Runner killer. I am keeping an eye on mobs that can run to frost-shock / earthbind / melee them. There are so many places where a runner can and will get adds and wipe your group.
3) Totem herder. I am always re-assessing the situation and the battle location to make sure totems are up, the correct totems are up, and near the fight.
4) Anti-caster. I am using earth-shock to pull in casters and grounding totems to take spells for the team. I'm learning in BRS that grounding totem can and will save your life, and I'm getting to the point where checking the grounding totem cooldown is just another part of playing smart.
5) Off-tanking. Sometimes an extra elite mob needs my special attention while the DPS squad cleans up.
6) AOE. In groups with a large amount of non-elites, I toss out magma totems and chain lightnings to help back up the cloth when they AOEs.
7) Dying well. I have to keep an eye out for where the mobs spawn and don't so if I die, I can die somewhere I can self-res without re-aggroing and dying again.
8) Bodyguard. I keep an eye open for mobs making a break for the main healer or other caster and earth shock them to pull them off the caster onto me. The real tanks should do this, but sometimes, one slips through.

And, I'm doing all of the above while I'm in the thick of the battle laying down some baseline melee DPS on whatever mob the /assist command points me at.