"Let me conclude with some tactical advice. If you want to take on a problem as big as the ones I've discussed, don't make a direct frontal attack on it." I re

"Let me conclude with some tactical advice. If you want to take on a problem as big as the ones I've discussed, don't make a direct frontal attack on it." I remember somewhere that AirBnB said they wanted to become the best marketplace for trading used goods. That's pretty ambitious, but they're attacking it sideways by letting people rent out rooms first.