Not all raids are the same, but they generally share characteristics. You can help out a lot by being prepared for the raid you are to be attending.
To raid with PQ you'll need the following add-ons installed and configured. More to the point you'll need to understand how to use them.
As part of implementing the second axiom, members should be able to contribute to a raid they are not attending.
Guild runs (where possible) will be streamed via
mogulus.com; more information about this may be found
here.
The official raid channel (/ra) is not used for any raids except for raid warnings.
The channel pqraid is used for for voice and raid chat.
This channel is not limited to those currently raiding, and is open to all.
If you've recently suffered a crash, please double check your game settings and test your voice communications.
Get repairs.
Check potion and other consumable supplies.
Ensure you've packed the correct gear (resist, alternate, etc).
Head over to the raid instance.
Start summoning people. We allow for a lot of dead time in the schedules, but it's better to be early than late!
Be patient! The raid organiser is probably busy.
Start buffing up where appropriate.