The Writers' Circle

I think what you're saying is right for some people but I have to be a certain frame of mind - sometimes ideas come to me while I'm cooking or in the bath and then its a race to get to the computer and put them down before I forget.  Sometimes new characters argue in my head all day long and the only way to quieten them down is to type them out when I get the chance.
Having said all that I'm quite a sporadic writer and do realise that routine would be a much more productive way.

Yes, you are absolutely right - ideas come and go at all times during each day (and night...). I have writtne ideas - or the perfect sentence down on most any scrap I could find, knowing that if it's not recorded...it will most likely be lost forever.

Yet, giving the mind a regular time and place to write can develop a habit of creativity - especially if one is working on a developing story...or so it seems. For me, my mind is my servant and sometimes, without proper training will run amuck - living a life of its own, making up priorities as it goes along. 

And also, if we write each day for a couple hours, we will see progress - no matter what it is we're working on. Just my thoughts on what's worked and not worked for me over the years and yes, for each of us...different ways and motivations work - there is no "one size fits all".