I know many writers hate this question but I love it (maybe because I haven't been asked it one hundred times in interviews) I know exactly where all my ideas have come from and I find it fascinating to hear what inspired other people.
At first my ideas came from reading or watching something and asking what if? Lately though setting seems to be inspiring me more and more. Which is strange as I really struggle with writing memorable settings. At the moment I have several ideas swirling that are set during snowstorms, wonder why that is!
I also have a great idea inspired by a trip to the beach last year and more specifically a beach cabin with a pink plastic flamingo outside surround by a shrine of shells and torches.
Not to mention the mystery set at the run down amusement park near us. The place has a old style carousal - I mean how can you not use that in a book?
Then there's the book I really want to dump the WIP for (I won't critique partners I promise!). That all started one late night when I was up with the baby and looking out over the moon drenched roofs.
So (if you don't loathe the question) tell me where you get your ideas.