I'm going to take the first chapter of a successful novel and break it down to see how the author hooks the reader, what information he feels is necessary at this point of the story, how he approaches things like POV, character and voice.
The book I've chosen is A Kiss Before Dying by Ira Levin (Rosemary's Baby, Stepford Wives). A 237 page, tightly written suspense thriller, it is a commercial novel but with many unconventional touches, extremely well plotted with some very clever twists and turns. It was his first novel, which is also one of the reasons I chose it. Chapter One is just over four pages long.
There will be the spoilers.
Chapter 1 starts with these lines:
His plans had been running so beautifully, so goddamned beautifully, and now she was going to smash them all. Hate erupted and flooded through him, gripping his face with jaw-aching pressure. That was all right though; the lights were out.
On the surface this gives a very clear indication of his mood. In fact it tells the reader directly that 'he' is angry and blames 'she'. The writing is visual and the last line gives a nice sense that he's hiding his feelings, but in many ways this would seem to be a overly 'telling' start. But as we'll see, it isn't.