Paint with words.
Start with a setting, some place. Describe how somebody sees something happening there and maybe their guess at why it's happening or a description of some object. Then tie that in with the rest of the story.
http://americanbookreview.org/100bestlines.aspFocus on something and build off it: A person, how two or more people relate to one another, a feeling, an object, a place, anything.
Direct Narrator FocusI am a terrible man who always forgave his enemies; they never saw my vengeance coming. I cried the first time I killed a man; time took away those tears. Today, it's just another knife in my hand and soon it'll just be another knife in another corpse.
(From there, there's any number of ways to tie that into ... I presume a story about an assassin? Maybe they detail his past and how he fell to this, or maybe he's an anti hero. Who knows).
Indirect Descriptive Relationship Between Two People:Winter's late dawns and early sunsets weren't bright enough for her to notice him walking three feet away from her in a crowd.
(Could be literal or figurative crowd. Etc.)
Direct Intentional Relationship:He always admired her beauty; she never noticed him.
Direct Metaphorical Thoughts and Desires/RelationshipThe light behind her beautiful eyes never shined upon him. He wished it would. It did not.
Indirect Object Focus (as relates to its creator)It was another weapon. Shining, sharp, and soon to be sold, Maten made the means men murdered with.
Direct Action Focus:He muffled the guard's scream with one hand and sank the blade into his lung through the shoulder with the other.
Indirect relationship focusing on thoughts:Peter always thought Morrison sounded so much more intelligent when he shut up.
Then of course, there's the thesis statement:Justice?—You get justice in the next world, in this world you have the law.
OR
Once upon a time, three years ago, there was a boy who grew up and hated what he became.
You might consider doing something like a web outline or ... have some means of showing what your story is about. All those links between ideas, people, places, things, etc... provide an endless amount of room to work with.