First, choose a format for your marketing plan. Please refer to the 1st FAQ question for more information regarding marketing plan formats.
Now that you've chosen a format, it's time to start filling in the blanks. Keep in mind, though, that like any other type of writing (or planning for this matter), your document should be organized and easy to follow.
To make sure your marketing plan is clear and concise:
Create an outline. Using your chosen format as a guide, start creating an outline of the sections and subsections you'll include in your marketing plan.
Fill out each section. Next, fill in the subsections composing each section of your plan. Keep them short and concise so you don't overwhelm yourself or your readers.
Include examples. Use any relevant data or case studies you've collected to provide examples of strategies and tactics that will work with your business. It can be helpful to include screenshots for social media posts, images of ads, or infographics in sections where they're most relevant.
Designate a timeframe. For each section, also decide on a timeframe for when you'll achieve the goals outlined for that particular section.
Revise and update. No document is ever truly complete so it's important to remember to update your marketing plan over time. The work involved in planning, developing, and revising your marketing plan can be daunting at times but it will pay off in the long run when you have a thorough, detailed marketing strategy.