Innovation can be as simple as combining two ideas or asking what's broken and needs to change. A colleague pointed out to me recently that innovation is often a matter of visualizing how to combine two great inventions. Take, for example, the wheel and luggage. Both were invented many years ago. Yet, the two didn't merge together to create Rolling Luggage, US patent no. 3,653,474, until 1972. We can't seem to do without our rolling luggage today.