So take what you know and write out a synopsis, as if you were submitting same to a publishing house. Remember for these, inclusion of the ending is necessary to see if you can deliver a good tale. Regardless of whether you are seeking a traditional publisher or going the Indie route, you can benefit from this step.
So if you have seven major plot points, you are in good shape, IMO. Take them and fashion a synopsis, a summary of your plot in order, maybe expounding on each point with a paragraph or two. Fourteen paragraphs is not unusual. If you check out a few publishing houses online and see what their requirements are (which differ from house to house), a traditional synopsis can range from one page to five.
Plus, it helps to see where you have glaring logic flaws, or holes where nothing much is going on. Not that you can't go with it, as is, flaws and holes and all; you just need to be prepared to work each out as you navigate NaNoWriMo.
Also, if you love Pinterest, as I do, find a good depiction of your hero and heroine. Post them online. Or print out one of each for your computer desk. Remember: a picture is worth a thousand words. Find one that propels you to write about the person in it.
While you are at it, peruse your baby name book collection (or telephone book or obituary pages) for the main characters' names. If doing a romance, it really helps that they go together well in the same sentence, like Barbie and Ken. Just something to keep in mind. I started a list of preferred male and female names, A to Z, from one of my baby name books. Haven't finished that project yet and still have other books to go.
Above all, remember to have fun with the whole process, y'all!
Denise Barker, author + blogger + copy editor