James Scott Bell in his Plot & Structure (Writer's Digest Books, 2004) talks about his LOCK system for developing strong plots
Lead character. A strong plot has an interesting Lead character, who is compelling.
Your character needs an Objective. Objective is the driving force of fiction. It generates forward motion and keeps your character from sitting around. Objectives take one of two forms: to get something or to get away from something.
Insert some Confrontation, opposition from other characters or outside forces that get in the way of your character achieving his objective.
Finish with a Knockout ending, one that leaves readers satisfied.
Using the LOCK system, with one line for each element, write a quick plot for your current idea
My Lead character is _______________________________
Her Objective is to __________________________________
She is Confronted by ______________________ who opposes her because _____________
The ending will be a Knockout when ____________________