I read the thread, but I'm going to be repeating some people's points, just cuz they're that damned important.
1. Some toons just need to die. That super squishy rogue that constantly draws aggro...the barbarian with no hp or healing amp...the fleshy sorc/wiz with no self-healing ability. If they are being an inordinate drain on your resources, fuck 'em.
2. Don't be afraid to call somebody out. There are times that a gentle /tell gets the point across...then there are moments when you shout "Hey, fuckwit! Pull it together."
3. Don't ever, EVER raise the squishy fuck in point #1. He will invariably charge back into the fight as buff-naked as the day he was born, and die again. Not worth the scroll, or the sp.
4. Join those PUGs. It's the fastest way to learn how to pull a raid out of the fire by its ears.
5. The leader isn't always right. If his way isn't working, and the raid isn't completely in the shitter, you still have a chance to make it happen.
6. Do NOT ever, ever ever ever let the AA, sorc, wiz, whatever...stand in your aura when they have a bosses aggro. They're close enough to you to benefit, but that means that when elite Harry gets pissy, you get nailed with the meteor swarm.
7. You have to be alive to keep everyone else alive...or kill bad guys. If it's down to you or the tank, the tank has got to bite it. Cuz he's gonna as soon as you're dead anyway. Be prepared to take the heat for it.
8. The one's that don't have healers/divines are the ones with the loudest voices. You will get far more shit from folks that don't have a clue about how different the game is when you play a Soul/cleric. Ignore them.
9. Don't expect a return on the resources you use. That way, when someone does chuck you a pot, or a piece of gear, it's a pleasant surprise.
10. Moving is critical. Nancy hit that one on the head for sure. Be the fucking bunny hopping around the place, it may just be the difference between life and death.
11. Always have heal scrolls. Always. It may not be your playstyle, but it's often the difference between chugging pots or making it through without.
12. There is a rhythm to healing. This is clear in raids like Shroud and EV6...the damage is reasonably consistent, so you can time your heals appropriately. I run with quicken and emp healing on all the time.
13. Know what the raid needs to complete, and run like hell if it's not joining the group. I can't count how many raids I've been in full of squishy melee, no tank, no CC...See the wreck before it happens and maybe dodge the bullet.
I reserve the right to add more when my brain isn't mush.