The classical marketing plan would follow the following scheme: Declaring the mission: this is the planning stage when we establish the organizational orientations and intentions, thus providing a sense of direction. In most cases, this is a general presentation of the company's intentions and almost has a philosophic character.
You must know your competition in and out. Keep your friends close, but keep your competitors closer. You need to know all the things that you learned about your customers except fill in the blank for each competitor on all of those above items. Learn how you are the same/ different. Learn the similarities/differences about each product and service you offer. Learn how they sell or promote their products /services.