Don't overwhelm yourself. I honestly think that there is a book inside of everyone, but they feel that they don't have the talent or time to write it. The trick is to start small. Start with an idea and then add another idea the next day until it turns into an outline.
If you are like me (no patience what so ever) the minute you start to write about that idea, more thoughts will flood into your brain and you will write more. If nothing comes on any given day, stop after just one idea.
Trust me, all those ideas will grow and grow.