I love Elizabeth Bishop's poem, "One Art." It's hard not to keep going in this vein with something like: 

Then practice losing farther, losing faster:
places, and names, and where it was you meant
to be. None of these will bring disaster

I lost a man with such good looks! My last, or
next-to-last, of three lovers who just left.
The art of losing isn’t hard to master.

I lost two skinny fellas, lovely ones. And, fat,
some men I owned, some as wide as a continent.
I miss them, yes, but it wasn’t a disaster.

The last stanza, so lovely, so true and painful--I would never want to mess with: "Even losing you (the joking voice, a gesture/I love) I shan't have lied. It's evident/ the art of losing's not too hard to master/though it may look like (write it!) like disaster."