When I'm paddling hard across a lake into a headwind or hiking up a tough trail I play the following tunes in my head:
"Not Giving Up" by Switchfoot - a real upper so-to-speak
"This Is Your Life" by Switchfoot again - title tells all
"Stand Back" by Stevie Nicks - a true classic, gets your blood moving
"Blurry" by Puddle of Mudd - another mover
"Little Wonders" by Rob Thomas - I know, I'm sentimental!
and my current fav:
"Say" by John Mayor - from the movie "Bucket List" but easy to sing and helped me hike down Skyline Trail Loop at Rainier 2 weeks ago after I'd fallen down and broken my ankle.
[I really like this thread. I have checked out several tunes for my I-Pod collection.]