Design and Development : The design and development will allow investors to understand your business product design and the production methods. The development of the marketing and the company itself should be included. It is also useful to include the budget for development.
Remember to take your lessons seriously and to raise all of your queries so that you can clear out confusions. Stick everything you learn in your mind instead of letting them drift away. And, apply all of those things because they will be rendered useless if you don't put them into action. Online marketing skills are best acquired by developing them on your own intelligently and making them work intentionally. You may not immediately jump into complicated methodologies but everything that you'll learn along the way will be of great use in the future.
It also needs to be written in formal format and style. You have to remember that a business plan is something that you may have to present to your business partners, financial firms and banks. So if you can, refrain from using slang in any part of your plan.
The most important aspect of business planning (the "What does it all come down to?" part), however, is spending the time to do your research ("due diligence") and critically thinking about these various aspects of your business. Of course, it is impossible to anticipate every detail simply by spending time thinking and writing; it is for this reason that plans are referred to and viewed as "dynamic". However, the more issues and scenarios you are able to come up with ahead of time, the more prepared you will be to handle these as they arise.