I have to travel a lot for work.
Decide very early on: do you want to be an actor or do you want to be famous? Because they're very different routes.
Violence is a very ugly thing. Violence is often so casual on film, and made to look so cool and so sexy, but violence is a repulsive, repugnant act that human beings inflict on each other. It shouldn't seem to be cool and sexy, ever really.