I have a tendency to generalize and widen the scope of whatever I'm thinking and writing about.
Earlier today, I was thinking about writing research articles. I was considering the process and thinking about each section (executive summary, introduction, background, experiment, results, conclusion...).
I was so inspired I proceeded to write a draft, and after 5 minutes or so, I realized that it would take days to do this properly.
Hence I thought, constraining is more important than dreaming big.