Mission Statement : Try to sum up what the business will be about in a few short sentences. A mission statement is similar to a slogan. It is a quick way of letting readers know about the ideals and standards that a company represents. Putting profits aside for a minute, try to think about the purpose of the business. How is your catering business making people's lives better?
Outline how you plan on getting leads and enquiries. You can run advertising, buy leads or try many other marketing strategies. Lastly, you need to have a sales strategy. Tell readers how you plan on selling your catering products and services in a way that you make the most of the limited number of enquiries that you receive.
Finally, a business plan should be error - free. This is important because your business plan defines who you are as a business person. If it turned out sloppy, then that does not speak too highly of you.
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.