"Where did you get the idea for novel #2 from?"
I can answer...
"It popped into my head while I was knitting and watching Antiques Roadshow one Sunday before Christmas."
I'm so rock and roll!
Seriously though - I think the lack of mental stimulation gave my subconscious the opportunity to go "Oi you, I've got an idea. Listen!"
I still haven't got the whole plot worked out for novel #2 but I'm getting there.