Dr Rao, this topic is not about developing writing skills. It is about attempting to convert a stray thought into concrete text.
Yes, sometimes something pops up in the mind and we struggle to articulate it into written words. There have been occasions when my fingers pause over the keyboard and my little grey cells will be at a complete standstill. I think and think and think, how exactly am I going to frame what I want to say into sentences which not only makes sense to me but conveys to my reader as well what I want to opine?
Take the recent example of the forum thread challenge. It was different from having to raise a spontaneous thread for discussion in the forum, in the sense that I had to put in an additional effort to piece it together in a more unique manner than usual. So while the topic was there in my mind and I wanted to "talk" about a campus library, I was not right away having the ability to neatly slot it into text.
When I have such difficulty, I resort to what I call a visualization technique. I simply let my mind visualize the lovely experience I had when I returned to my college campus a few years ago, after many years. One of the spots I re-visited was the library and had a lovely chat with one of the assistant librarians who were still there (later met the Head Librarian elsewhere on the campus). That experience brought back fond memories of the time I spent there when I was a student. So when putting the text for the library thread, I similarly visually wandered around the library, between cupboards where I would search for a particular book and tables where I sat jotting down notes, smiling when the librarian would catch somebody talking, etc. That clicked!
When you make a commitment, you create hope. When you keep a commitment you create trust! ~ John C. Maxwell