Don't quit.
I posted this to another blogger, on another service. Thought others could use hearing it:
Richard Bach, writing to his months-previous self (who'd just had his car repossessed): "You survived because you decided against quitting when the battle wasn't much fun ... that was the only miracle required. [snip] Please don't waste your time worrying or being afraid."
From his book, A Gift of Wings, very much worth the purchase.