That's a bit of a daunting question. There are so many things. Art, music, poetry, books, nature, science, technology, movies, TV, theatre, coworkers, family, friends, advertising greats...the list goes on and on. It's so hard to pinpoint one thing. I would say that inspiration comes from the world around me, both real and digital. It's the experiences I expose myself to, the people I surround myself with, and maintaining a curious nature and an open mind. 

It's about how you put the filter on your view in life, there's inspiration everywhere. You could say that it's a copout answer but I would challenge you to say that if you are only inspired by one thing, how can you truly be inspired?