A marketing plan is a basic element and serves as the design of your business. Start by doing a feasibility study to check if you really have a market for your product. If there is, check the review done for existing businesses similar to your own, either by researching online or through actual interview of consumers. Set specific objectives, goals and your expectations for the possible outcome, and then make an outline your plan. This should include: description of product, your target market, consumer population, price, and promotional campaign, competitors in the field, budget, profit margin, product assurance and warranty.