Some writers come up with ideas that don't relate to what they're doing right then and lose them because they can't be bothered to get a separate piece of paper or open a new file on their computer. Here's your answer: the PostIt Table!
As you can see, the entire top surface of it is made up of giant Post-It notes. When you've filled one up you tear it off and stick it on a wall or transfer any useful information (or particularly brilliant doodles) to a more permanent home.
It's the brainchild of Italian design firm SoupStudio. I don't think it's being produced for sale, but you can create one of your own. Ryman (here in the UK) sells pads of Post It Meeting Charts 2.5 x 2.8 ft, or paper rolls (less sexy but also less expensive) 29.5" x 10 ft; you could cut that into sheets or attach a dispenser like a big paper towel roller to the edge of your desk. You'd be the envy of all the doodlers and note scribblers you know!
(Want writing advice from the best? We're talking about Twain, Stevenson, Austen as well as modern masters like Joyce Carol Oates, Kurt Vonnegut, and Turman Capote. It's all in my newest book, "Your Creative Writing Masterclass," published by Nicholas Brealey and available from Amazon or you other favorite bookseller.)