Did "One Art" by Elizabeth Bishop influence your title choice?
I stole it right out of the poem. :) I had a completely different (terrible) title when drafting, but to go on submission, I had to come up with something better. I'm the worst at titles and after after several dozen other terrible suggestions, I went to Elizabeth Bishop, one of my favorite poets, for inspiration. When I sent THE ART OF LOSING to my agent, he wrote back "I think we found your title." So thanks, Elizabeth Bishop, for the inspirational words!