Yep, the "what doesn't kill you..." one is a pet hate of mine too. I mean, what a load of rot... what doesn't kill you doesn't do anything other than not kill you. It doesn't make you stronger, weaker or anything else. Personally I think this is a thinly-veiled way for society as a whole to comfort themselves with the knowledge that those who endure the worst are somehow better equipped for it than the average person, and so there's no need to worry... it goes along with the whole "you don't get more than you can handle in life" sort of thing. Ok, great, well now that I know that I have herculian strength and endless capacity for suffering, then I feel so much better about myself.
I also hate "tomorrow is another day". Yes, how lovely, another opportunity to experience this reality over and over again. While I do accept the underlying message that it's always important to keep hanging on and to try to believe in a better place, I think this is a grossly superficial kind of invalidation about reality.
"Don't let yourself be defined by your past". Well, excuse me, but for some of us, everything that contributed to defining us as people was harmful and abusive, and it's hard not to be defined by your past when you never had an opportunity to define yourself by anything else. Of course that's not to say that you don't try to believe you can recreate yourself for the future, but to say that anyone - trauma sufferer or not - is not largely defined by their past, is simply unrealistic.
I think I'm sounding very grumpy today aren't I...