Google the word “fuel,” and Jacksons, Maverik, and Shell pop up as the first results, followed by off-road wheelers from fueloffroad.com, a band named Fuel, and Thai cooking classes that advertise as “fuel for the soul.” Fuel is power, energy, the stuff that keeps us going. The need for fuel itself has waged wars, encouraged green energy and savings like solar power, and motivated marathon runners to cross finish lines. Is it food? Is it family? A muse, perhaps? What exactly ignites the imagination, accomplishes goals, and gels our creative juices when we’re searching for a boost?