Just one?! In addition to books, movies and songs, I find the Olympic Games very inspirational. Watching athletes give it their all after training for years is amazing. More so - when they have to overcome odds or injury during or prior to an event.
Man's Search for Meaning (Victor Frankl)
Tuesdays with Morrie (MItch Albom)
Little Princes (Conor Grennan)
The movies I find more inspirational are those based on true stories. The Blind Side, Invictus, Freedom Writers are a few that come to mind.
When I Get Where I'm Going (Brad Paisley)
Dream Big (Ryan Shupe and the Rubberband)
Better Than a Hallelujah (Amy Grant)
I Hope You Dance (Lee Ann Womack)