when i have no dreams to give you anymore i'll light a blazing fire
Another thing I have learned over the years is that sometimes you can't jump right in and write a story when you have the first inkling of what it's about.
Sometimes, it helps to write down some notes and then stick them in a file and wait until they set deep roots.
You can always add more notes, after all, as they occur. It's like fertilizing the plant.