First, you will need to have a strong desire to be successful because all successful companies have a well planned and executed marketing plan. Many components comprise their marketing plans and they may vary depending upon whether you are a B2B company, B2C company, a manufacturer, a retailer, a service company, a reseller, a non_ profit or other specialty business.
Risk _ in our marketing plan we shouldn't only concern about making money or positive points, we also should address the risk we are taking. for example it is common for a marketing plan to capture things like, "require additional staff to handle sales call", "additional investment from the management budget will increase chances of increasing 10% sales target" and many more. Imagine if you can factor your risk earlier and think through it, wouldn't it be better for you?