The more you write, the better you will write! So - keep at it!
I write a story in my head. I see the story like a movie.
I mostly write short stories. They are best written in a continuous creative process. You have a feel of immediacy.
When you write a novel you have to live with the characters for a long time. So I prefer short stories. I never wrote anything more than 250 pages.
When I write I just keep a waste paper basket handy in case I am experiencing a block.
