I have two.
I want to set up a start up that delivers the exact amount of milk you need every morning, fresh, on electric zero emission carts in reusable and environmentally friendly glass bottles, that are returned and reused that evening.
I have an idea where all across all communities in the UK we would have a system whereby you register for free to a group, who then have thousands of actual real best selling books that you can borrow for free. No deposit, no credit checks, and minimal late fees. Oh, and it also supports dvds, ebooks, audio books, and free IT services.