1: Write regularly. Daily might be extreme, but try to be extreme.
2: When in doubt / take it out.
3: At the end of your writing day, do not complete the action/description/dialogue – but know what it is. Start with this known at your next writing time. 90% of the time you will slide right back into the work.
4: Eschew, Ignore and Abandon All Hope Ye Who Enter Here, the notion that there are no rules. There are rules to everything. Artistic Creation demands rules.
5: Follow your characters.
6: Follow your characters.
7: Follow your characters.