If you ask me what is the best tool in product design, I would definitely say a big whiteboard. I know people from lots of startup companies. When they start small, their office is small, and their whiteboard is tiny. Over time, there was lots of wear and tear and the writing started to get obscure. But whiteboard is the vision of your business. It incorporates the best ideas from your team, but more importantly, it reflects all of your thought processes and all of your a-ha moments when you were in the zone. Without keeping note of it, it may never be retrieved. Whether it’s physical whiteboards or writable walls, or even zoom annotations, they are really worth every penny or your investment.