Its not about staying positive, its about staying realistic. Life is not rainbows and lollipops the whole time but its not doom and gloom the whole time either. In general, the way I try to live my life is when its bad remember it will get better, and when its good remember it will get worse. I find this keeps me even and keeps me from doing stupid shit due to being caught up in either extreme. Its not just a stuttering thing, its a whole life thing.