Resource Plan _ in marketing, there is only one thing that's scarce: RESOURCES. Some people have a lot of money but lacked ideas and another group is the other extreme; more ideas and less money. Many of us probably the later than the former! In the marketing plan we will tackle things like people to hire, pricing, distribution plan, sales programs budget and so on.
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.