I carry a small bottle of RuGlyde or Simple Green. Both work well and if you let it sit on the bead for a bit, it makes popping the bead MUCH easier. I've heard some folks use Chapstick in a pinch to re-seat the tire.
"You think I can remember what you posted a year ago? I can't remember what kind of beer I drank for breakfast." -SScratch
'10 KTM 990 Adventure aka The Spork