This excellent video from Business Model Generation explains the essentials of generating a business model for your current business or the idea for your next enterprise:
So if you need to re-structure your current business model or make a business model for the idea that’s itching to get out of your brain and into the real world this 2 minute video is a good place to start.
If you are interested in more details information on start up business models, they have some excellent tools to help you find your way around.