Great post. I have the same problem sometimes and I'm also a INTJ, so maybe this is just part of the personality. I'm fine after I get started and sometimes the ideas just flow and I can't get myslef to shut up and stop writing. What I've been trying to do is when I'm in the mood then I write as long as I can and then spilt up the posts and schedule them to appear over several days. This way I get constantly updated content,but I don't hav eot do it every day.
It nice to know I'm not alone in this.
Bruce