To make an effective plan, there is a famous rule called 4P's. Here, P's stand for Price, Product, Promotion and Placement. In this another P is added called People. Today while doing digital marketing or the traditional marketing one should understand people or the customers you are dealing with. It's important to figure out what is significant for the business, and later make a plan accordingly.
Establishing strategies: several strategies are to be formulated, in order to cover the distance between what we want to achieve and what is possible to achieve, with the resources at our disposal. As we would usually have several options, we should analyze them and chose the one with more chances to achieve the marketing objectives.