Look at my response for Sam's 'Blocked' post if you want. I hope this helps!

Well, usually I think of all kinds of interesting things for stories.  Then after a while I incorporate what I thought of into a story.  If you really want help, here are some ideas that will help you brainstorm if you're really stuck.

1.  Decide on a genre for your story.  Do you want it to be fantasy, fiction, or even nonfiction.  This will help you pick a plot.

2. Pick a plot.  You have to decide what your story will revolve around.  Spies, fairies, anything works just makes sure it corresponds with your genre.

3. Bring characters to life.  Don't just plop your character on the paper.  Make up their favorite songs, colors, get to know your character.  Getting to know your characters helps you become more interested in your story.

4. Have FUN!  Don't write because you "have to." Write because you WANT to.

GOOD LUCK WRITING YOUR STORY!

I have a notebook that I keep next to my bed at night and carry around in my backpack at school. That's where I jot down any idea when it comes to me, whether it be a name, a phrase, a word I heard and liked, a plot idea, a character inspiration -- anything that could be developed into something more. I flip through it when I'm running low on idea jolts. Some story ideas just come to me, though, like one big package falling out of the sky -- bam, here're your characters, basic plot, and ending scene. I just have to write them down quick and think about them more before I start actually typing the story.