But, I don't specifically mean my own Marketing Plan S6PEC Framework because there are so many versions and gurus out there that can give you the benefit of marketing plan. Of course I am going to say mine is a lot better because it's a practical and practitioner's guide. Other than being a consultant, I also have performed marketing manager role, entrepreneur role, business manager role, investor and student of entrepreneurship (during my MBA!). But that's not my main point. My main point is for you to have a marketing plan to guide your business. Which one? Well it is up to you!
You need to know everything obtainable about your customers. This list will get you started. You will need their age, sex, marital status, income levels, education levels, geographic locations, where they shop, if they go to church, if they have kids, ages of children, political affiliation, what they like about your company, what they don't like, why they shop with you, what they value about your products/services, what they like the most/least about products/services, and whether prospects are unaware of your brand or products/services. Customers want you to know certain things about them and if you do, they will remain loyal to you as you take time to know them.