Stump the Chump: How Do You Hold a Reader's Attention?

Today's question comes from a young writer who no doubt will become a superstar author one day. How do I know? Am I some kind of prophet? Do I read tea leaves? Did I get a screaming hot deal on a crystal ball at Woot? Nah. Nothing like that. I'm confident she'll succeed because the girl has a hunger to learn the craft. Here's her question:

"My story is long. How do I keep a reader's attention?"

The answer to that question is to raise a question. At the end of every scene, leave the reader wondering about something. . . 

Will the heroine give in to the temptation to eat a slab of chocolate cake and ruin her chances of fitting into her wedding dress next week? 

How is the hero going to escape the clutches of the ninety-seven-year-old granny who's stalking him? 

Where in the world is the villain's rubber ducky--the one that fell off the back of the pickup truck and is filled with C-4?

Not every scene has to end with a helicopter crash, but there does need to be some hook to make the reader turn the page instead of setting down the book. And that's accomplished by raising a question in the reader's mind.

Apparently I'm on a Dear Abby roll, so if there are any other questions you'd like to stump the authorly chump with, leave them in the comment section.