I just came across this article called 5 Good Reasons to Stop Acting by Bob Fraser. I really really like it. Fraser's basic philosophy seems to be "if you want to act, act. If you really want it you will get there".
I think that in some part of my head I already knew everything he talks about (that you don't have to be good-looking, that you don't have to live in the right place, that it doesn't matter what Other People think, etc, to succeed at acting) but it's good to be reminded, by such a passionate writer who seems to really care about the people he's talking to.