1/ What is your story? find it
2/ find your main characters, develope them, add others in the wings
3/ Construct your story, old line Begining-Middle-Ending
4/ Pull it to pieces, make it work, make it come alive.
5/ Write everyday, at least a thousand words, practice makes perfect.
6/ Ask yourself would I read this
7/ If you submit to publishers, ask about their submission policy first. If you self publish, give it thought, search for what your budget is.