I find inspiration from inspiring people.
There's some people out there, like Seth Godin, for example, who have a real ability to inspire others, and I take advantage of that. I try to surround myself with positive, empowering influences and I allow myself to be inspired by the success of others. There's some very remarkable people in the world, and I think forming connections with them, even just as readers, or fans, can often be a real benefit.
More directly, in my own life I have one person, in particular, who is just awesome, and her accomplishments prove to me that a single person can make a difference in the world.