There are plenty of plan template formats to consider. Some are simple lists, while others contain a series of frames or tables in which to sequester certain concepts. When choosing a lesson template, be sure to use one that isn't overly complex or confusing. Additionally, choose a font that's readable as well. By choosing these little steps to make your plan template more legible, you will save yourself a lot of confusion in the long run.
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.