You must know your competition in and out. Keep your friends close, but keep your competitors closer. You need to know all the things that you learned about your customers except fill in the blank for each competitor on all of those above items. Learn how you are the same/ different. Learn the similarities/differences about each product and service you offer. Learn how they sell or promote their products /services.
But, before we continue, we must understand and accept that steps of the marketing plan are universal. It is a logical approach of the planning activity, no matter where we apply it. The differences you meet from a plan to another consist in the degree of formality accorded to each phase, depending on the size and nature of the organization involved. For example, a small and not diversified company would adopt less formal procedures, because the managers in these cases have more experience and functional knowledge than the subordinates, and they are able to achieve direct control upon most factors. On the other hand, in a company with diversified activity, it is less likely that top managers have functional information in a higher degree than the subordinate managers. Therefore, the planning process must be formulated to ensure a strict discipline for everyone involved in the decisional chain.