How to be a sucessful RL?

Things like that vary from each guild. Do whatever works best for you.

I would say that the most important thing you need to learn is to find the balance between having enough authority to take command and push the raid forward, and still not being too stubborn so that you don't listen to advice and just do your own race.

If you manage to stay somewhere in the middle of that, and at the same time keeping your raid members happy, I'm sure you'll do well :)