Are you on fire? Fan the flame!
Sometimes just the right word for a sentence, the perfect turn of phrase or the best ideas, come at the worst times: you were just about to fall asleep or dinner is almost on the table or you're driving. Doesn't matter. Keep a notebook by your side or in your purse at all times or use your smart phone and record what just popped in your mind. It's often greatness and can lead to more inspired writing if you let it. However, promise yourself you'll remember and, you know as well as I, it's gone forever. So, pay attention to Thoreau. He knew a little something about writing, after all. "Write while the heat is in you."