Do your homework
If you have no, or a vague idea, where to start, begin with finding out what other people have written about your topic. Simple google search of the key words gives an insight into public opinion on the issue. Look at research reports, blog entries or videos: they may give you a good idea for a story lead.
Give it a thought in advance
Don’t try to type in the story on the top speed the moment you saw the topic. Linger on it, have your thoughts wander for a while. Depending on how urgent your story is, allow yourself reasonable time to think of it before actually commencing to writing.
Jot down your ideas
After you gave your brain the task to think of story ideas, your subconsciousness keeps on working on them even when you are not aware of it. So the ideas may pop up when you don’t expect them; that's why it is handy to carry a notebook to jot them down.
After you have a considerable number of ideas piled up, organize them into a structure. Write the key words on the sticky notes and then arrange them in the logical ABC order, so that one idea leads to another. For each point write a paragraph giving explanations and supporting examples.
Address someone you are comfortable talking to
If you still find it hard to put your thoughts into words, you can trick the writer’s block by pretending you are writing to someone close, someone you would be comfortable to relate your story to. When working on a draft for this article I actually started it with “Dear Andrew”. It is not that my friend Andrew is about to write something and is tortured by the writer’s block, but I wouldn’t mind sharing the ideas on the topic with him.
Take a break
In case you tried many word combinations and your muse still doesn’t want to show up or has abandoned you halfway, walk away from your work for a while. Remember, our subconsciousness is smarter than we might suspect and it keeps on processing ideas even when we focus on something else? Changing mental activity to physical often turns out fruitful. In my case, the most brilliant ideas hit me when I am in the gym or take a walk. Physical activity pumps more oxygen to the brain and has an anti-depressant effect causing an increased flow of ideas in your head.
Play with words, experiment with sentence structures, read your work aloud and check how it sounds. Realizing that you have written a great story can put a broad happy smile on your face and boost self-esteem. So just fall in love with words and enjoy them.