Have just been reading Neil Gaiman's latest blog post (http://journal.neilgaiman.com/2009/05/entitlement-issues.html) in which he says:
"Some writers need a while to charge their batteries, and then write their books very rapidly. Some writers write a page or so every day, rain or shine. Some writers run out of steam, and need to do whatever it is they happen to do until they're ready to write again. "
I'm really glad he addressed this in his post, from the point of view that you do only tend to hear about writers who work like machines, who write, say 5000 a day every day. In fact, I've just been reading Writing magazine (aimed at retiree writers by the looks of it) and all the interviews with authors in there are all "I write X number of words a day" etc and no one tells you how difficult it is sometimes, how your brain feels fried and you feel like what you've written is utter drivel and that you must have serious problems of self-delusion to think that you're ever going to get published...
So that's why it's nice for a 'proper' writer to recognise this fact that writers aren't robots. I should add that there is a distinction however between the words not coming and simply "putting it off", which is often hard to distinguish and both can be self-perpetulating.
I think I need a holiday.