I found "The Secret" when I was still working on overcoming my social anxiety/panic attacks. I think there are some good general messages in there, and it can be inspirational and make you feel a bit more optimistic after watching it.
However, as anything, I take it with a grain of salt. There are some things in there I don't agree with, but overall I found the movie helpful in my struggles, and watched it over and over many times as it always fired me up to overcome my anxiety problems and live a real life again.
Cheers,
steve