I know you all will think I am kidding, but I am not..
I have a fairly stressful job and sometimes I leave work with the worst headache.. I mean eye throbbing, ear splitting aches..
Well, the last 3 times I had the headache, I took a 30 minute ride(all I had time for before dark). I swear that within about 10 minutes, my headache was gone and I forgot that I had one.
What an awesome cure