Some of you might not have this problem, but I sweat like a man when I run. Seriously. For a while, I was just wiping it away with my hand or my shirt, but then it got to the point where I realized it was a situation. I picked up a cheap arm and head sweatband duo on Amazon (like $3), and I alternate between the two, depending on how hot it is. When your ass is tired and dripping buckets of sweat, wiping it away and feeling fresh will give you the motivation to push on. Trust me on that.