Certain writers have it very precise and there's not much room to add something.
You don't always have to have the answer to everything.
Passion should always trump common sense.
I think Hollywood has a class system. The actors are like the inmates, but the truth is they're running the asylum.
You don't just play a part. You've got to earn the right to play it.
Don't let yourself get attached to anything you are not willing to walk out on in 30 seconds flat if you feel the heat around the corner.