um find a new area of interest? Most creative people I know myself included suffer from the problem of too many Ideas and not enough focus. They tend to have too many ideas but struggle to finish things without a lot of effort.

But regardless what i do is start with a seed idea and begin to flesh it out and expand it. Then write various scenes that I want to play out in that story. Once I have the scenes I like written up I start expanding out from there and begin to turn those series of scenes into a fully fledge plot arch and story.

The most important part though is spending a couple of hours every day working it, The more you write the better you'll get like any other skill or talent.

If you haven't got any ideas to start with then begin with inspiration from something you thats already out there you like. Then either write it as a piece of fan fiction or your own take an existing idea.

Well, do you know what creativity is? A lot of people have a misconception that creative ideas just pop magically into some people's heads. It's not like that at all. Creativity is about combining familiar elements in new ways. Creativity also has more analysis involved than many people realize. The groundwork for producing creative ideas is being able to recognize pattern and elements in others' work, because this is the major source of building blocks and blueprints for your mental supply bins and drafting tables that you use to redesign and assemble your own original works. Analysis is also involved in the sense of "know thyself" - figuring out what you like in others' work and why is the main way you figure out what you would like to put in your own work.

As the people before me, I too advise -- just starting typing/drawing or whatever other manner you would like to express yourself in. The key is the first step -- want to write, start writing. Want to code, grab a book and create a "Hello World". Want to draw, grab a crayon and smear it over some walls. Some activities will seem more difficult than others, but it's determination what really sets people apart, not the actual skill level.

That said, don't discard any idea, no matter how stupid it might seem. Train and work WITH your subconcious, not against it. If you will keep shunning that little voice in your head -- if ti says "make a chocolate dragon in a marshmallow kingdom, and the dragon will melt it's citizens with hot cocoa", don't be like "this is stupid/childish/other adjective here". Say "okay, we have a draon in a kingdom of marshmallows. And here comes a knight from the Gum Empire. He has to defeat the dragon in order to marry the princess of Marshland, ensuring an alliance against the Legions of Sour-on". See? It still sounds, well, as it does, but it's a story you can expand upon. And your inner voice is satisfied and more motivated to throw fresh ideas at you.

Another thing is writing the whole thing. That is a challenge many are not even aware off or back away from. Let's say you have the above idea. Everything may seem fine and dandy in your head, but can you actually see the faces, places, sounds and smells of the kingdom? Will the dragon be of dark, white or milk chocolate? Wil Sour-on be a despicable gummy-bear that just lost it's flavour? Will the knight have the power to inflate/deflate himself? Many questions will rise, like a giant tidal wave, once you start working on a world. Some will need answering and be presented, others will remain your private knowledge, useable in sequels or secret levels or plot twists. Writing can be as fun as anything if you put your heart into it!

Great book on creativity:
A Whack on the Side of the Head: How You Can Be More Creative
by Roger Von Oech, George Willett