We all have trouble finding the right words sometimes. Some of us even seem to NEVER be able to choose the right words at all or stay silent, as to not cement the fact that we are fools. Regardless of our particular issues, the ability to open your mouth and insert your foot seems to be the great human unifier, while the ability to be cool about someone else's traumas, foibles or faux pas is divine.
I remember reading a good story about Cary Grant. He was filming a movie with Audrey Hepburn (maybe Charade?!? That was a good one!) and they decided to take a break at a local cafe to enjoy some wine. Audrey, gesturing wildly, knocked the bottle all over him, ruining his jacket. Not missing a beat, he continued the conversation while removing his jacket and putting it on the back of his chair. He didn't say a word, but his message was perfect.
Check out this post on the Happiness Project about some other simple ways to say the right thing.