A crash course in changing the world.
My favorite secret is learning to work with $2 a day. That one rings personally with me because this summer when I was traveling in Spain with my friend. Near the end of our travel we were getting really low on money and many days we spent worrying where our next meal was gonna be at and how we could manage our money to make it last for the rest of the trip. I think that every one should learn that one specifically because it teaches you to be creative with your resources and really brings out human ingenuity.