Draw a web, or take notes of those random thoughts.
Write one page a day, when you get stuck make up something bad anything to get you a 2nd page after a while when you read it over you will say what the hell did I write it should be this...then you make it better over time.
I get stuck, loose motivation all the time. It's not easy .hope something helped.
Yes thank you that is helpful and makes sense. Sometimes I try to write a lot and then I get side tracked.
Treat it like a diary and don't put it away. Leave your book out to keep reminding yourself to write. Otherwise a month will go buy and your notebook is on a book shelf