Reddit mentions of Acting for a Living: How to Act Outside Hollywood - Become an Actor; Work in Film, TV & Video; Make it Your Career

Fantastic advice. I'm an actor in Atlanta and I see actors of all ages in my classes and auditions. I also attended Jason Alexander (George from Seinfeld) Streaming Class from LA recently where audience members were selected to perform and get feedback from Jason. And there were a few who were 50-60+. So never too late to start. I'm a guy in my mid 30s starting out myself so I know a thing or two too :)

And in terms of resources, I super highly recommend the following book "Acting for a Living: How to Act Outside Hollywood" by Roy McCrery. There's some super actionable concrete advice on what you need to do and why regional markets (ie, not LA or NYC) actually are much BETTER to start your acting career in.
Amazon link to book: http://www.amazon.com/Acting-Living-Outside-Hollywood-Become/dp/1466383402/ref=sr_1_1?ie=UTF8&qid=1345734877&sr=8-1&keywords=acting+for+a+living (It's NOT a referral link).

EDIT: To elaborate on why I like this book - Roy talks about what the best survival jobs are for actors (sales), how to self-market even if you have an agent (calling production companies directly), how to cheaply practice earprompter skills etc. Awesome advice.