It was once thought that creativity could not be willed.
Percy Bysshe Shelley wrote:
A man cannot say, "I will compose poetry."
The greatest poet even cannot say it: for the mind in creation is as a fading coal which some invisible influence, like an inconstant wind, awakens to transitory brightness; this power arises from within, like the colour of a flower which fades and changes as it is developed, and the conscious portions of our natures are unprophetic either of its approach or its departure.1
While I like the metaphor of a burning coal, I believe that photographers can breathe on their coal/creativity to make it happen, as does John Cage.
I think people who are not artists often feel that artists are inspired.
But if you work at your art you don't have time to be inspired.
Can't find or make a photograph?
Don't feel like finding or making a photograph?
Pick up your camera, and take a photograph of anything to get something.