Slowing down helps a lot too.

I find that my face gets out before my armpits. So a cool cloth works great. But it isn't too serious. I find the worst is when the destination is too hot. Then I get hotter. Try to cool off for 5 minutes. The worst days for me is going straight from biking to the train station straight to a crowded subway car. I put on extra deodorant.

Drinking a cool glass of water at arrival does wonders.