Preparation for Book #2: Gathering notes

Book #2 is set in Oceania: the Pacific, Australia and New Zealand. Even when a novel is set in the real world, world-building applies and mine relies heavily on notes and photographs I've taken during my travels. 

Unfortunately, the ones for Book #2 were made at least three years ago (+ a few stories from a trip ten years ago). All of them are now scattered and mixed up with other stuff, across numerous files on a laptop which is breathing its last, and all over the Internet. My first long and grueling task is to bring them together and sort them out. When I'm done, I expect to have 20,000 to 25,000 words, none of which will be usable directly, but most of which will eventually get recycled into the story.