If you need an idea for writing, visit http://www.objectwriting.com/ for a daily topic idea.
If you’re out and want to sit and write, look around you and pick something: the sidewalk, a traffic light, gum on the ground, the wind, the wire chair you’re sitting on, the latte that you’re drinking – and write. Let it take you where it will. Keep your mind open. Pretend that your fingers are writing on their own and that you have no control over them.
Many things lay around you that you can choose. You might think writing about a pen is boring, but suddenly you create a character who held the pen last and start writing. What was she writing? To whom? What feelings are conveyed? Sadness? Joy? Just let go and let your pen fly across the page.