Whats the best way to get castings for film or theatre?

Question: Whats the best way to get castings for film or theatre!?
Best Answer - Chosen by Asker:

To get Casting Notices!?

1) Agent
2) Paper (BackStage, for example)
3) Online Listing (actorsaccess!.com, mandy!.com, playbill!.com!.!.!.etc)

To get an audition!?

1) Self-submission to public casting calls!.
2) Your agent submit you through breakdown services!.Www@QuestionHome@Com

to have an agent and to know how to network!.Www@QuestionHome@Com