Design - Keeping a Notebook

I have finally started a designs notebook, out of necessity, really. As a matter of fact, I am amazed that I hadn't done this before. Right now, for example, I have about 10 solid design ideas in my head. The best thing for me to do is to put them down on paper, while they are fresh. For example, there's a new slouch hat I cast on, a new crocheted shawl I've started crunching on and I actually have started crocheting it. There's a new idea I just got for another hat, with enough detail that there needs to be a sketch, but some other particulars may need to be fleshed out. I am not naive enough to believe that ideas will always flow this way. There are always dry periods where nothing will come. I will need this notebook full of ideas for times like that. Not that my sketching abilities are all that great. However, I don't think that will really matter. After all, they are for my purposes.
Now, regarding the shawl. I don't want to say too much, but it is inspired by one I saw in a movie and it uses one particular motif. Do you think there is anything to the fact that, since I saw this movie, I have seen the motif everywhere! I think it means I am supposed to make this shawl and will have no peace until I do. Wish me luck:)