A glimmer of creativity

I had a flash of creativity today while driving home. I am going to start writing a book. Recently, I've decided that one of my life goals is to write a book. It sounds so cliche... one of thoes things that "everyone" wants to do. For the past few months I've known that I want to try my hand at writing on the side, but had no clue what to write about. I don't want it to be cheesy. I want it to be about something I love. Instantly I thought about traveling. I have a huge passion for it and I'm pretty knowledgable. The problem is that I'm SO passionate about it, that I tend to turn into an overly sentimental, sappy mess. I get stuck on the emotions of it all and end up not giving very good information.

Back to my original point. I want to write something unique and written from a female perspective. It definitely has to be a work of fiction and I want to add depth to the main character. The books that I personally love are the ones where I feel like I've gotten to know the main character. I came up with this idea in the car and I instantly had to write it down as soon as I got home.

It's by no means what the final product will be... but I think that if I brainstorm a little bit, it might actually develop into something with potential.

Here's the basic premise so far:

You are given the chance to relive three significant experiences in your life. You get to pick the experiences and you have the choice to change only your actions (if you choose to). You are not able to control how others act, but you are responsible for how your actions change the actions of the people around you.

The catch: You will have to give up one important thing in your life. The problem: You are not allowed to choose this thing, and you won't know what it is until you return to the present.

The main character will be a 30-something female who has lost her husband in a tragic accident within the past year. She's started to heal and is starting to put her life back together. She's given this opportunity. (I haven't decided how she'll run into the chance, maybe a mysterious stranger or a book that she finds that tells her how to tap into this ability...) She is hesitant to try it at first, but then realizes that she can relive experiences from when her husband was alive. She knows that it's unhealthy and at first turns it down, but the opportunity is just too much for her. She gives in and decides that this will be her way to say goodbye to him once and for all.

Of course, the problem will be that she ends up giving up something that she can't imagine living without.

So there it is. The beginnings of an idea.
Who knows where I'll go with it?