A good template will provided a step_by_step approach with explanations as to why each step is proposed. The strength of the marketing plan derives from the integration of each step. So if you leave out a step, you may undermine your own plan.
The third section of the marketing plan is GOALS. This is where you lay out exactly what you want to accomplish with your marketing efforts. Without goals you will never have a benchmark to compare to. If your marketing plan is a one year plan, how will you know if you were successful or not at the end of the year of marketing activities? Another critical element of the Goals section is to schedule evaluation points throughout the duration of your plan. Having these points predetermined will allow you to continually assess the effectiveness of your efforts.