When someone says "hang in there" I get the sudden urge to hang myself in their front yard.
Are you going to have a sign with that disgusting quote taped on your hanging corpse? Most humans aren't capable of putting two and two together. I picture that optimistic imbecile losing so much shit at the sight in its front yard, it would fill its entire home and drown in it.
Along with the other saccharine verbal diarrhea described by the other posters, here are some more abhorrent phrases that make my blood boil:
"Stay positive!"/"Think positive!"
"Stay strong!"
"Keep trying!"/"Don't give up!"
"Smile!"
"Cheer up!"/"Keep your chin up!"/"Chin up!"
"Life is precious."/"Life is a gift."
"Life is journey."
"Happiness is a choice."
"Despite everything, I believe that people are really good at heart." -Anne Frank (Fuck you, bitch!)
"Laugh, and the world laughs with you."
"Nobody can make you feel inferior without your consent." - Eleanor Roosevelt (Fuck you, you victim-blaming cunt!)
"Pull yourself together."/"Get a hold of yourself."
"Love makes the world go round."
"Man up!"/"Don't be a pussy!"
"Pull yourself by your bootstraps."
"Calm down."
"Take a deep breath."/"Breathe."/"Count to ten."
"Fake it until you make it."
"A smile will open more doors than a frown will."
"Get over it!"
"(Insert offender's name) didn't mean it."/"(Insert offender's name) means well."
"Honor thy mother."/"Honor thy father."
"Family is everything."
"Life is like a box of chocolates."/"Life is a bowl of cherries."
"When life gives you lemons, make lemonade."
"Forgive and forget."
"Forgiveness will set you free."
"I'm sorry you feel that way."
"If everyone around you is an asshole, you're the asshole."
"You're okay."/"You'll be okay."
"Be brave."