The things I jot into my idea books that begin with the letter 'D' couldn't exactly all be called ideas, but since they're part of my books, I'm sharing them today.
Devotions Life often gives me excellent pictures and examples of our relationship with God/Jesus. In moments like that I will quickly jot down what ever it was that caused me to think deeper and how it ties in with our spiritual life. Later I'll go back and add Bible verses and references that match up with it. I find it very inspiring to read back over the things I've written.
Dinner Since I use three ring binders for my idea books it makes it easy to add and remove pages as needed. I always have a week's worth of dinners planned. At the end of the week I'll remove that page and create a new one for the next week's dinners. If it was an extra good week I'll tuck it into the front pocket to be used again in a month or so.
Dreams I have two sections for this. One I have as a list of dreams I have for the future, while the other is of dreams I've had at night that stick with me and I jot them down to think about later.
Doodles I have a few pages that I doodle on when I talk on the phone. I'm not sure what it is about talking on the phone that always brings out the mindless doodling part of me.