You should allow yourself a couple of months to write the plan, even if it's only a few pages long. Developing the plan is the "heavy lifting" of marketing. While executing the plan has its challenges, deciding what to do and how to do it is marketing's greatest challenge. Most marketing plans kick off with the first of the year or with the opening of your fiscal year if it's different.
Marketing plans include overall marketing strategies, pricing, sales tactics, services and warranty policies, advertising and promotion, distribution, product desires, market research or market research. The steps to conduct market research are: identifying problems, collecting data, analyzing and interpreting data, drawing conclusions and taking action.