You may have friends with similar tastes. You may live in a neighborhood with similar houses. You may look like other people, yet not quite. That's because there's only one you. You are a unique person, with your own background, family, and memories.
Remember that when you write. I'm not saying to cram all of your views into your manuscripts. What I am saying is to develop your own style. Sure, you can learn from other authors who have mastered the craft, but bottom line is it's your voice that needs to shine through.
No one can write like you do because they haven't experienced life exactly as you have. Become one with your characters. Enrich them with your own emotions taken from the joys, triumphs, sorrows and disappointments you're already lived through. The instances won't be the same, but the way you express your feelings will put the reader deep into your point of view.
One way of doing this is by including something that happened in your life, but put a different spin on it. I'm borrowing from one of my experiences in my work-in-progress called Forever Young. A while back, I was bitten on the face by what appeared to be a friendly dog. It was a horrid sight. Fortunately, a plastic surgeon repaired the area so well you wouldn't be able to tell where it happened. In my novel, it's a different story. The face of the person bitten can't be repaired. The result is his outward looks become a mirror of his grotesque thoughts.
So, give the reader what no one else can provide. Take advantage of the fact that there's only one you.
What other ways can think of to make a book unique? Have you included something in a book you'd like to share?