I find this quite an alien concept, at least in my current frame of mind.
I used to write whatever came to mnd and never even think about the story. Then I started plotting just in my head first, roughly where I want the story to end up and whatever cool scene pop up in the proccess.
But, im trying something new this time. I'm currently planning detailed notes scene for scene, sometimes phrases in speech, and vague descriptions of action for a four book series, and am half way through book three at the moment. This isn't just one paragraph per scene either, I'm talking probably close to thirty pages of detail each for books one and two. And I'm raring to get the story down still, come the new year.
I haven't left room for character expansion during my writing, I know what they are doing pretty much all the time, but that doesn't mean they won't throw in some curve ball lines of speech along the way. Knowing the plot back to front isn't enough to curb my enthusiam for writing the rest. With the framwork of plot already in place, I can focus on the pretty parts, writing the descriptions of scenes, the conversations, the action, bringing my world to life. Yes the story and plot have to take the point, but they don't have to be the sole focus of my writing, and I certainly don't have to dig deep to discover it while I'm in the mood for writing buckets at each sitting.
It remains to be seen whether I can manage what I plan in Jan/Feb, but at the moment I'm very much positive about is approach to my writing and think it might be the way forward for me for here on. I look back onthe discoreery writing I did when I was younger and still do love to write like that, you can get some great stuff at way, but for me the story has to be thought out properly first.
Though maybe this is all because I know I'm just awful at editing my own stuff, so if I write it by the pants... Up till now it mostly stays by the pants