Ever get asked what your book is about? Your mind goes blank and you start to fumble your words.
"It's about this girl who lives with her mother, having to take care of her, but then she discovers that her mother has been hiding a secret from her, and that she actually has magical powers, and is the subject of a prophecy, and yeah...there's more to it than that, but it's hard to explain without going on forever, or having my notes here."
Until you run out of breath and feel utterly embarrassed and inadequate.
Have I been in that sort of situation? Oh yeah, all the time.
What you need in moments like these is a one-line synopsis. A quick line to explain what your story is about. Some say that this should be under twenty five words if you can manage it. I say, that's not good enough! I try for less than fifteen words, which in my case means exactly fourteen.
Your one-line synopsis should not include your character's name or physical description, but should introduce a conflict or obstacle.
"A girl becomes the subject of a prophecy and joins a world of betrayal."
Fourteen words right there. It's a little vague, since I wrote it off the cuff.. Still, it's a vast improvement from the ramble above. You can tailor your own one-line synopsis to suit your premise Just keep working on it until it is under 15 words and you are able to recite it easily without adding, "Um…yeah, or something like that" at the end. You need to show that you know what your story is about. Exude confidence!
Start working on that one-line synopsis. It might take a while, but you just need to polish that gem until it gleams.