I know that most new recruits are told to make that first list quickly and introduce everyone you know to the opportunity. This is the basic old school marketing plan for MLM and it is no longer practical. The problem is this sets the new recruits up to be rejected by people they actually care about, and continuous rejection usually results in the newbie quitting before they ever got very deep into the business.
Marketing Research will be the first component for your marketing plan. You may be doing this in house or you may elect to hire a top marketing agency, a marketing consultant, or maybe a specific marketing research firm. You need to obtain and capture all data about your business along with your products and services to help you properly facilitate any potential marketing problems. You may also be able to get some marketing data from an industry trade association or from other businesses within your specific industry.