Pinboard is one of four absolutely essentials tools for me when writing a book. I used it to save all the research for past, current and future books. I have 797 bookmarks for the Korea foodalogue I am working on at the moment. I saved those links over the period of a year or more. They’re easily searchable by tags and I refer to them, and add more links, every day. Pinboard is like carrying around a library that is directly related to my book. If you’re a writer and you’re not using pinboard, or another bookmarking tool, you really are missing a trick.