From the outside, it occurs to me (quite frequently, actually) that this writing caper doesn't look particularly difficult or taxing.
Just yesterday, for example, I sat down on a sunny spot on the couch to think through a knotty plot problem (namely, that this novel doesn't appear to have one).
I worked so hard at this that I slipped into a deep sleep, and woke an hour later. Oh yes, it's tricksy stuff, this coming up with stories. On the other hand, I did discover a facet or two of character motivation which might help with the ending at least.
Now all I have to do is get there.