An opening line or scene or conflict or dilemma may catch your fancy but rather than linger there for very long, take the inspiration you're given and stretch the ideas all the way to the climax of the story.
In other words, constantly ask yourself what the climax scene may look like. In so doing, consider the traits the protagonist will need to have in order to prevail at the climax.
Such a search opens possibilities for the traits she will be missing at the beginning of the story, the flaw she'll have to overcome to be triumphant in the end and what traits she now has at the beginning that are going to interfere with her forward progress toward her goal.
This exercise will serve you well during the first week of November, which represents the beginning writing portion of the entire project and the time you'll want to incorporate the traits she embodies at the beginning to foreshadow the journey she'll have to undertake.
For step-by-step guidance into pre-plotting your novel, memoir, screenplay, refer to:
The Plot Whisperer: Secrets of Story Structure Any Writer Can Master
For more about the Universal Story and writing a novel, memoir or screenplay, visit the Monday Plot Book Group series (A directory to this 2nd plot series is to the left of this post and scroll down a bit) and visit the first Plot Series: How Do I Plot a Novel, Memoir, Screenplay? on YouTube. (A directory of all the steps to the 1st plot series is to the right of this post.)
and visit:
Blockbuster Plots for Writers
Plot Whisperer on Facebook (we hope you "like" it)
Plot Whisperer on Twitter