When I ask entrepreneurs and small business owners, it is not unusual for not having any marketing plan. I once read that Sir Richard Branson never had any marketing plan when he started the 1st Virgin business many years ago. In fact in one study of entrepreneurship (I couldn't recall the name of the study) was that as much as 50% of entrepreneurs and business owners don't have a business plan and marketing plan when they first started the business.
Marketing Mix: one of the key points of the marketing plan is the design of medium and long_term approach of the 4 Ps (price, place, product, promotion). Action Program: on this section all the actions to be performed are gathered with specific information, timetables and responsibilities among the personnel. Provisional Income Statement: the plan must include an income statement with any inputs for which the marketing department is responsible for.