I look at nature. To me, it is all meaningless, so to look at something like a star or a tree or water or a bear and realize that it is just as meaningless as me somehow puts me on the same level as it. And to think I am equal to something as great (IMO) as a star is pretty inspirational.
Also, my professors, some music, various literature all inspire me. However, there's nothing I do with the intent of being "inspired", inspiration is spontaneous.