This is a guest post by David Bailey, Entrepreneur in Residence at Downing Ventures in London.
Before I launched my startup, 3 Kinds of Ice, I spent a couple of weeks testing my idea with potential customers, using a method called paper prototyping.
Paper prototyping is a useful DIY shortcut for testing early product concepts. Instead of building a real app first and getting it wrong, you draw out the user interface of your potential app and test the way users interact with it. It’s cheap and helps you validate your product idea fast.