I was stuck on a bug for two hours until my buddy at the coffee shop pointed out my typo

Ever think you're too careful to make those kinds of mistakes? I sure did. Paul87 is right, your eyes just stop seeing the problem after a while. I had a similar thing with a missing quote that cost me a whole morning, and it really humbled me. Now I step away for ten minutes when I'm stuck, and it often jumps right out at me.