Well, time travel.
But really - patience, understanding and the ability to not freak out over the stupidest, most ridiculous, harmless things. I am a drama queen. I am a glass half-empty. I am an avid subscriber to Murphy's Law. I am an emotional basket-case. Therefore, it's in my nature to freak out over every single thing. I'd like the ability to not have to do that anymore. It's exhausting.