Keep Your Marketing Plan Flexible
Your working methods and plans must be flexible. You may write the business plan and the marketing plan with the consultation of educated and expert people, and you may include all the details carefully. However, if this plan is not flexible, it won't be practical.
Your plan must accommodate contingency plans in case something unexpected happens. Even natural disasters such as flood and earthquake may affect your plan.
If, for any reason, you didn't achieve your designated goals during the first or second week, you must not stop the work or fire the employees. Instead, you must have a backup plan for such situations. This plan will help you adjust your methods so you can achieve your set goals.
The smart move is to plan for every direction from the beginning. You may have to blow up the entire structure of your plan, but due to the various expenses for planning and starting a business, calling it off will impose a huge loss on you anyway.