For Self-Tape Audition Services, I recommend:
SkyTown Entertainment: Quality and affordable audition taping in NY & LA for over 10 years.  Their clients book!

Other resources:
Actors Connection: Since 1991, Actors Connection has been opening doors to NY's top agents, casting directors, personal managers and print agents!

The New York Conservatory for Dramatic Arts: Recognized as the premier film and TV acting school in the country.
Actors Access: Casting site for actors
Casting Networks: Casting site for actors
Backstage: The Weekly Actor's Resource.  Also home of Call Sheet, formerly Ross Report.
Voice 123: Jump start your Voice-Over Career.
AEA: Actors' Equity Association-Representing American Actors and Stage Managers in the Theatre
SAG-AFTRA: Merging Screen Actors Guild and AFTRA into One Union
The Drama Book Shop: Bookshop with theater & film titles that include plays & scripts, plus in-store scene readings.
TKTS: Choose from a wide array of Broadway and Off Broadway musicals, plays, and dance productions on sale every day at 20% to 50% off regular prices.