Given Twilight is huge right now despite being shit, it bears out the stats provided that suggest in order to successfully break into novelling, you need to be writing young adult fantasy romances four years ago.
Given the stats I'd go further: you need to write an
urban science fantasy young adult romance (although when it comes to romance I prefer
this), four years ago (although the publication date data is going to be a moving wall heavily skewed to more recent years, so start right now on your epic).
With that in mind it should be easy enough to come up with something... So I give you a story under the working title
Young Gods (after the Swiss industrial band, a chapter will then have to be named "Skinflowers", in fact I wonder if you could name all the chapters after their songs?), while keeping an option open on
Teen Dieties - an 18 year girl steps "off the map" and finds herself in a strange and unfamiliar part of town, where she meets a lovely young man who she falls in love with. Unfortunately his parents disapprove and things get dangerous when it turns out they are all gods and this gets ratcheted up a notch as the Dark Gods are due to return any time (might want to throw in her heart being torn between two lads, one of which turns out to be a Dark God). Spin that bad boy out for a trilogy ending with Armageddon where the fate of the world rests in her hands.
Ka
Ching
Oh and the twist is they aren't gods but aliens and it might just be the Good Gods (or "Oh my Gods") are the giant space bastards and the Dark Gods more akin to freedom fighters.