- If you find money on the street, don't be ashamed to pick it up!
I've seen guys in sharp suits stand on subway platforms and toss pennies onto the tracks, as if the weight of them was just too annoying to have in their pockets, or perhaps just to prove that a mere coin couldn't possibly be something they'd need to worry about. If you don't want your pants to hang funny, fine, but at least give it to a homeless person!
Now I am not advocating that we all turn into the weird guy with the metal detector, and I do not recommend staring at the ground all the time to search for money, because A) you'll miss seeing a lot of really interesting things, and B) you'll end up with back problems.
But money is money-- if you see it, why pass it by?