on The Creative Penn:

When crafting your next bestselling book, capturing creative ideas on the fly is often the greatest author challenge. The last thing you want is a missed opportunity at creating something special.
What if you are in the swimming pool and a thought floats by? Out for a run and forgot what you were thinking when you arrived home? For writing consistency, authors must remember and capture those fleeting moments.
When you have that next idea in mind, here are eleven ways to capture it quickly, before your thoughts move on to something else:
