I think if you set some rules to the story, like connecting somehow the beginning of the story to what we write. If we jump all over the place, as some people have noted, it gets disjointed. It also makes us work harder to try and pull this together into one story, because the ultimate goal is to have a story, not little skits here and there of disjointed thoughts. It's interesting at first, but it takes up a lot of energy to try and connect everything into one story.
I don't want to give a lesson here (I write stories a lot) but if someone changes the direction of the story, which is ok, have they read what happened before so it ties in to the story? Also, if we say this is a mystery, or a thriller, or a love story, or a historical story, whatever, it might help with the theme so we stay within some kind of boundaries. Does that make sense?
I wanted to mention plot because that is the backbone - let's say you want to start a story, and at the beginning you tell everyone at SF that the plot of the story is that someone wants to achieve something (whether it's to steal, to marry, to get a job, to get healthy, to have a family, etc) and by the end of the story, they hopefully will have achieved that goal. Otherwise, we risk randomly following different leads with no ending.
These are my two bits.
