Something I read in a Jackie French book has stuck in my mind. She said something about it takes 3 years to become a plumber, so why expect to become a writer overnight. You need to practice every day.
I've joined Writing.com as a way to get reviews on my writing. One of the threads has a daily prompt with a competition to write a short story (less than 1000 words) on the prompt topic. It's a great way to get some impetus to do something each day.
I wrote my first 1000 word story today - it's nothing special but I was pleased with it because I managed to actually finish something!! I have a great deal of trouble making my stories "fat" (as Jackie French puts it) so it'll be good practice.