When you're on this board, just post in the comments box something you are insecure about - please, don't dwell on it! Just post something little to express yourself. I find that it can be very, very helpful and comforting to express an insecurity or worry to others. Maybe you'll find the same thing.
The catch is, when you express something you're insecure about, you also have to say something like about yourself! It can be physical, mental, whatever - it just has to be positive and about yourself. A little count-your-blessings type thing.
(I think that NMG does a wonderful job of this topic, but I wanted to add a little more. Frankly, we could never have enough of support on this issue.)
Basically, I created this message board as a way for girls to feel like it's okay to have insecurities, and also okay to love them.
Hope you all enjoy this :)