It takes all those paragraphs in Vanity Fair to dish the dirt about Alexander McQueen's self-destructiveness. However, for most of our other communications, short form is what we have to get our heads around.
That's because capturing the essence in 140 characters, a few sentences or sudden fiction begins in our brain, not our tool box of words. In his book "How To Write Short," Roy Peter Clark takes too long to, well, say that. Here you can take a peek at his tome.
Thinking short entails focusing total brain power on what's the message. Not creativity. Not will that client love it. Not how well we are doing in our careers.
For example, George Orwell's message about controlling governments was how too clever by far they are. He captured that in the term "newspeak." "New" usually carries a positive connotation." And, "speak" is a universal in society. Talk, we all do.
Orwell could do that because all the wiring in his brain was attuned to the specific Machiavellian ways of totalitarian governments. We have to ensure our wiring is in the same state when we do short form.
That means thinking thinking thinking. Actually that was always true. Even in the old days when we were trained in long form. The best term papers, essays, 30-page "short" stories, and 400-page books were the end product of deep cognitive dives. The actual writing was just the tip of the iceberg, to use that cliche.
How to get into the habit of thinking? Ironically, what really helps is to read a lot more long form. That helps with understanding the essence of the whatever.